Harry Potter: Hogwarts Mystery

Harry Potter: Hogwarts Mystery is a video game developed by Jam City, released for mobile devices on 25 April 2018. It is the first game to be released under Warner Bros. Interactive Entertainment's Portkey Games label.

In this game, the player creates their own character, and takes on the role of a Hogwarts student. The character experiences all seven years, and takes part in classes as well as extra activities such as the Duelling Club.

Several actors voiced characters that they had played in the Harry Potter films before, including Warwick Davis, Michael Gambon, Maggie Smith, Gemma Jones, Zoë Wanamaker and Sally Mortemore.

Setting
The player creates a character and follows the story of a student at Hogwarts School of Witchcraft and Wizardry, and throughout the game will have to make certain choices which determine the path their character will be placed on, including the kind of relationships they build with other characters. Along with the story told through each chapter, they have the opportunity to achieve rewards by learning spells and potions.

The story follows the character for their seven years of education at Hogwarts from 1984 to 1991. In that time, the game will feature characters known from the books during their student years, including Bill Weasley, Charlie Weasley and Nymphadora Tonks. The game also features teachers who were working at Hogwarts during that time including the characters of Rubeus Hagrid, Severus Snape, Minerva McGonagall, Albus Dumbledore, Filius Flitwick, and Rolanda Hooch. During the timespan, an infant Harry Potter was only just spared  his life. Cedric Diggory was mentioned by his father, that he would be joining Hogwarts as a first year student by the time the player reaches year 6.

The player
The player will receive choices to make throughout the game. The answers they give from a number of three possible answers can determine which wand they receive, how strong their friendship with another character will be or how to deal with a situation which could have an impact on them later in the story. They have the choice of rewards which help contribute to the Courage, Empathy and Knowledge level of the player. The rewards can be earned in classes or by completing pieces of the story. Certain choices may only be available if the player's Courage, Empathy or Knowledge level are high enough.

Levelling up will have all energy restored. By tapping on the character's face on the upper left, current level and level progress bar will be visible underneath the character's name. When the bar is full the player levels up.

Energy
The player completes each chapter for both the classes or the story by using energy to complete tasks. The initial full limit of the player's energy is 24, though it can be broadened throughout the game. When the player uses one energy it will take four minutes for the energy to be added back to the game. The number of energy one general task will take varies between 1 and 5, in special cases, when the outline is red instead of blue, it can take up to 13.

Throughout the game, there are hidden opportunities to gain energy by clicking on a certain character or item. They are known to include: The player cannot go over the energy limit except in a few instances (buying energy with diamonds, levelling up friendships, duelling club, getting energy from pets). Thus, tapping the above locations with a full energy bar will not help the player get more energy.
 * Clicking Borf when he appears between the Grasslands and Forest, so that he reacts and runs away.
 * Clicking the Golden Snitch flying above the Quidditch Pitch, so that it flies away.
 * Clicking the empty portrait placed next to the Charms Classroom so the Girl with Flowers will reappear.
 * Clicking Peeves when he appears between the portrait of Fytherley Undercliffe and the Divination Classroom, so that he laughs and vanishes.
 * This option seemed to only be available after certain events; Peeves used to be a non-interactive element between the Grand Staircase and Courtyard.
 * Clicking the still-life painting in the West Towers that contains white flowers in what appears to be a tree trunk so that three oranges will reappear and the white flowers bounce.
 * Clicking the middle of the three suits of armour on the right of the Great Hall entrance when the middle suit is holding a sword and the right suit a shield, so that they will switch what they are holding.
 * Clicking the unlit torch on the right of the Great Hall entrance so that it will relight.
 * Clicking the unidentified house-elf near the Hogwarts kitchens when it appears to be asleep so that it will run back to the kitchen.
 * Clicking the small branch on the path between the Whomping Willow and Hagrid's Hut so that Fang will fetch it and run down to Hagrid's.
 * Clicking the disorganised books on the bench between the Library and the History of Magic Classroom so that they will be neatly stacked.
 * Clicking the student with a sled standing in the alley between Three Broomsticks and Honeydukes so that he will slide down.
 * Clicking the black spider on the spider web in the Forbidden Forest so that the web will flop down and the spider will bounce off to the tree roots, with the web springing back up afterwards.
 * Clicking the sack of gold in the walkway between Flourish and Blotts and the Leaky Cauldron (in front of Gringotts Wizarding Bank) so that a Niffler will pop out from nearby boxes and take the sack of gold, while accidentally dropping a few gold while it runs away.
 * This option currently contains an unfixed glitch where after earning the energy, immediately reentering the location after going somewhere else, would have the sack of gold back present without being actually clickable.

Sometimes when the player runs out of energy in the middle of a task, the option of watching a 30 second advertisement to get 3 bolts of energy would be presented. One must keep pressing until seeing the "Out of Energy" message in order to see this option.

In-App purchases
The game offers a reward or purchase of coins and diamonds which can be used to buy in-app purchases including more energy or even clothes, hairstyles and accessories for the character. The coins will also need to be used to complete a certain part of the chapter including 100 coins to build a relationship with another character or learning to duel.

At the beginning of Year 1 Chapter 7, a special 48 hour sale is prompted to buy 130 gems for $0.99 (originally $4.99).

House Cup
The player will win or lose House points throughout the game which could depend on their choices. Their ranking will be placed on the Leaderboard for how many points they have earned overall for the House. They will be placed in a list of randomised students and their choices could have an impact on the House placement in the rankings overall. The winner of the House Cup at the end of the year will be rewarded with an increasing number of Gems beginning with 100 Gems for first year, 125 Gems for second year, and 150 Gems for third year.

Story, classes, and side quests
The game-playing takes places in two sections: the story and the classes aspect, with the addition of side quests. The player will not need in each chapter to complete a class or a side quest and then move on to the story. They can complete in the order and the pace they decide. However, the game will not allow the player to move on to the next chapter or part of the chapter unless the player completes both the story and class.

To complete a class, the player earns stars within a time limit choice of either 1hr, 3hrs or 8hrs which effect the number of stars they can earn and therefore the rewards. If reaching the maximum star before the class hour is up, the player can leave class early. In each class, they will have to trace spells or rotate potions in an similar way to an old feature. The player could be asked a question about the subject during the class, and providing the right answer will reward the player with their choice of energy, points, coins or diamonds. Everyone will receive the same questions but the order in which they are asked throughout each chapter will be randomised. For example, one player could answer the same question earlier in the game than another player who will receive another question instead at that point.

Duelling
When encountering a duel, the game offers three choices: Sneaky, Defensive and Aggressive. Sneaky defeats Defensive, Aggressive defeats Sneaky and Defensive defeats Aggressive. If losing, the player may spend a certain number of coins awarded in the game, and try again.

The occasional Duelling Club events may grant different prizes for every win; the Duelling Room is located in Dungeons; when opened, the player gets 3 tickets for the entire time period. For every duel won, would sometimes earn +4 energy or be rewarded with coins.

Friendship
In the App update released on 30 May, 2018, players now are able to build friendship outside of the main story arc. This new feature disabled the old "Explore" function those three locations used to have, in which the player could enter, but only to look around as there was no interactive setup. Sometimes, events make certain friends unavailable, for example Tulip Karasu at the beginning of Year 4, as she is first missing and then sent to the Hospital Wing.
 * Meal with a Friend: Located at the Great Hall, 10hrs for the next cycle after playing; previously costs 85 coins.
 * Play Gobstones: Located at the Courtyard, 16hrs for the next cycle after playing; previously costs 100 coins.
 * Drink Butterbeer: Located at the Three Broomsticks, 16hrs for the next cycle after playing; previously costs 100 coins.

Tapping the character icons of friends on the bottom right of the screen, shows friendship levels. After a certain level, the reward for levelling up friendship is energy. The higher the next friendship level, the higher the energy reward (+5, +10, +15, etc.) until reaching max friendship level.

Some charms, spells and potions cannot be learnt by attending classes, and must be taught via side quests or achieving a certain number of wins in Duelling Club. For example: Leek jinx is a gifted 'Sneaky' Duelling move by defeating 20 duelists in a day while the club was still an exclusive club.

Dating
It is possible that, with future updates, the player will be able to date other characters as their friendship advances to a greater level; this was hinted by Andre Egwu at Hogsmeade during the third year. Some commentators believe that those may include same-sex dates as well as opposite-sex ones.

Pets
In the App update released on 26 June, 2018, players now have the option to purchase pets. Players can purchase a Ginger Cat, an owl, a white rat, a toad, a spider, a puffskein, or a snail. The player can keep a pet with them at all times, with additional pets being kept in the player's dormitory. Tapping and awakening sleeping pets can give players energy. In an update on the 28 September, 2018, it became possible to purchase magical pets, a crup and a streeler. Both of these are available to purchase with notebooks, a new currency available through completing classes and events.

Availability:
 * Cats: Year 1 Chapter 4
 * Owls: Year 1 Chapter 5
 * Rats: Year 1 Chapter 8
 * Toads: Year 2 Chapter 1

Year One
Year One of the game contains 10 chapters (11 for early players). The player gets to select their Hogwarts Houses (Gryffindor, Hufflepuff, Ravenclaw, or Slytherin) and participate in Charms, Potions, and Flying classes, while meeting friends (Rowan Khanna, Ben Copper, and Penny Haywood) and archenemy (Merula Snyde), and experiences playing Gobstones and duelling.

As the player tries to find out what happened to their older brother, Jacob, the existence of the Cursed Vaults is revealed, with Ice Knights and the Vanished Stairs decided to be researched upon. At the end of the school year, Hogwarts Headmaster Albus Dumbledore promises to discuss the Cursed Vaults and Jacob another time.

Year Two
Year Two of the game contains 11 chapters. Aside from the three previous classes, the player gets to participate in Transfiguration in addition. Ben Copper went missing at the beginning of the school year, later found to be trapped with cursed ice and rescued by Professors Minerva McGonagall and Severus Snape. Meanwhile, the player, with the help of Rowan Khanna, continues to search for clues about the Vanished Stairs and the Cursed Vaults, sneaking into a common room from another House. They successfully locate the Vault of Ice, but results in Rowan being injured; the player is subsequently introduced to Bill Weasley for further help.

After being trained, the player with two friends venture into the Vault of Ice where they find a notebook and broken wand and a voice tells the player to never let "her" find the other ones. Near the end of term, Dumbledore tells the player that they have something important to talk about at the end of next year.

Year Three
Year Three of the game contains 11 chapters. Aside from the four previous classes, the player gets to participate in Herbology in addition. The player experiences the Hogsmeade weekend trips, during the first of which, is officially introduced to fellow yearmate Andre Egwu. The player also becomes closer friends with Nymphadora Tonks, Tulip Karasu, and eventually Barnaby Lee; the latter two formerly being close friends of Merula Snyde.

Hogwarts School of Witchcraft and Wizardry suffers from several Boggart attacks not long after the start of term, which is concluded to be caused by another Cursed Vault. The player, with the help of friends, locates and ventures into the Vault of Fear. With the use of Jacob's wand found in the last vault, they find a map of the Forbidden Forest and an arrow.

By the end of term, Dumbledore tells the player he has been looking for the world's finest Curse-Breaker, Patricia Rakepick and that he invited her to join them next school year. He also warns the player to not break anymore rules.

Year Four
Year Four of the game contains 17 chapters. Aside from the five previous classes, the player gets to participate in Care of Magical Creatures in addition, where they catch up and spend more time with Charlie Weasley.

At the start of term, Professor Albus Dumbledore introduces the students to Curse-Breaker Patricia Rakepick, who tells the students not to go look for the Cursed Vaults. Hogwarts students become largely affected by the Sleepwalking curse, with most students heading towards the Forbidden Forest, which is concluded to be a likely location for another vault. The broken arrow found in the previous vault is believed to have belonged to Centaurs; upon studying and asking around, the player befriended Centaur Torvus, who formerly owned the arrow.

As the player tries to locate the vault, Rakepick occasionally lends her Niffler, Sickleworth, to help out. The Forest Vault is found, the player hears the mysterious voice (believed to be Jacob's) telling the player that they're "nearly there", but that all vaults but the last one are false, meant to be distractions and traps. The voice reveals they are trapped within the next vault, and that only the player can free them, and that then they can find the final vault together, as "they" cannot be allowed to find it first. Using Torvus' arrow, a portrait of a dragon and a small sweater are revealed.

Due to a history of rule-breaking, the player is set to serve detention under Pitts the House-elf in the kitchens, beginning on the first day of their Fifth year, until the player has "learned their lesson". The player also learns that Rakepick will depart from the role of a curse-breaking consultant, and step in as the Defence Against the Dark Arts professor for the next school year.

Year Five
Year Five of the game contains 34 chapters. Aside from the six previous classes, the player gets to participate in Defence Against the Dark Arts and History of Magic in addition.

Magical Pets
This quest introduces you to special pets, such as Crups and Kneazles. There are no choices. You earn +50 Empathy, 1 coin, and 100XP.

Gobstones with Friends
This quest is just a regular game of Gobstones with one of your friends. You earn +50 Empathy, 1 diamond, and 150XP.

A Friend in Need
"Ben Copper, the cowardly Gryffindor, has a good heart and a preternatural gift for Charms work…he could use a friend like you."

- Quest description

Afraid to Fly
Roughly takes place during Chapter 7, consisting 4 stages: The player agrees and talks to Rowan Khanna who tells the player perhaps they could help Ben Copper improve his Flying class skills. The player finds Ben and helps him study in the Great Hall.
 * 1) Meet Rowan
 * 2) Study with Ben
 * 3) Talk to Ben
 * 4) Attend Flying Class

Ben continued to feel worried about flying which gave the player the idea to help Ben feel okay with flying by using the Levitation Charm on him. They tell Ben to find them in the Courtyard later. They use the Levitation Charm on Ben but he is still nervous about flying so the player agrees to help Ben at Flying class. The player has the choice of how to help Ben and encourage him throughout the class. Ben finds a new-found confidence for flying and thanks the player for their help. Ben tells Madam Hooch and they both receive ten points for their Houses.

Test of Strength
Roughly takes place during Chapter 8, consisting 4 stages: The Prefect also asks the player for a word and tells them they are hoping to continue preparing the player for future challenges by continuing to teach them duelling with Ben. Ben agrees to continue helping the player because it will improve his duelling too. The player decides whether they should learn by having a proper go at duelling each other or whether to go easy on Ben.
 * 1) Report to Angelica/Chester/Jane/Felix
 * 2) Duel Ben
 * 3) Study with Rowan
 * 4) Duel Angelica/Chester/Jane/Felix

They will then duel Ben. Ben will only use the Defence option and the player should use the Sneaky option to defeat him. The Prefect then tells the player to research duelling because they will be duelling the Prefect next. The player and Rowan later meet up to plan the duel they will have with the Prefect. Rowan gathered every duelling book they found and offers to help the player read through them. They then study duelling together. The player then thanks Rowan.

Rowan notices that the player spends little time building friendships with the people in their house, and asks them to spend time with their fellow house friends. The player agrees and then they gather at the Training Grounds to duel the Prefect. The Prefect and the player duel. The player needs to pay attention to the pattern of the Prefect's actions in order to know what to do to defeat them. The player then decides whether they want to tell everyone they won or whether to keep it between them and the Prefect.

House Meeting I
Note: This Side Quest has a different name depending on the the player's House. Roughly takes place during Chapter 9, consisting 2 stages: As a Ravenclaw or a Hufflepuff, the player gathers with people in their house, including Rowan and the Prefect to talk about and revise for their classes. As a Slytherin, their house also brainstorms on how to win the House Cup. The player has the option of being part of planning for revision or to go along with the other's plans. As a Gryffindor, their house talk about beating Slytherin in the upcoming Quidditch game.
 * Gryffindor: "You're a Gryffindor"
 * Ravenclaw: "You're a Ravenclaw"
 * Hufflepuff: "You're a Hufflepuff"
 * Slytherin: "You're a Slytherin"
 * 1) Talk to Rowan
 * 2) Attend the House Meeting

House Meeting II
Note: This Side Quest has a different name depending on the the player's House. Roughly takes place during Chapter 3, consisting 3 stages: The Prefect of the player's House decides they need to make Slytherin pay for their treachery. If the player is Slytherin, the Slytherin Prefect decides they need to get revenge on Gryffindor for being obnoxious about winning the Gryffindor and Slytherin Quidditch game. They create a plan and the player decides who should be the leader. They agree to gather in the Clocktower Courtyard.
 * Gryffindor: "Gryffindor Goals"
 * Ravenclaw: "Ravenclaw Rules"
 * Hufflepuff: "Hufflepuff Helps"
 * Slytherin: "Slytherin Schemes"
 * 1) Meet with Rowan
 * 2) Attend the House Meeting
 * 3) Show Your Stuff

Merula's Revenge
Roughly takes place during Chapter 4, consisting 4 stages: Merula Snyde is embarrassed that she lost to you last year and wants to have a rematch! The player will try to convince her otherwise and to put it behind her, but she will force it upon the player anyway. Penny offers you help in the courtyard for training.
 * 1) Talk to Penny
 * 2) Attend to Potions Class
 * 3) Defeat Penny
 * 4) Defeat Merula

Growing Pains
Roughly takes place during Chapter 6, consisting 5 stages:
 * 1) Visit Madam Pomfrey
 * 2) Get Ingredients from Snape
 * 3) Talk to Madam Pomfrey
 * 4) Study Treatments
 * 5) Tend to Patients

Help Hagrid!
Can appear before the completion of the side quest above. Roughly takes place during Chapter 6, consisting 10 stages:
 * 1) Talk to Hagrid (Courtyard)
 * 2) Talk to Hagrid (Great Hall)
 * 3) Meet with Rowan
 * 4) Gather Lavender
 * 5) Gather Dragon Horns
 * 6) Gather Fire Seeds
 * 7) Meet Hagrid (Training Grounds)
 * 8) Talk to Snape
 * 9) Meet Hagrid (Great Hall)
 * 10) Meet Hagrid (Corridor)

Sleep Walker
Can appear before the completion of the side quest above, consisting 5 stages:
 * 1) Talk to Madam Pomfrey (I)
 * 2) Research Sleepwalking
 * 3) Talk to Madam Pomfrey (II)
 * 4) Study Episkey
 * 5) Learn Episkey

Nobody's Prefect
Can appear before the completion of the two side quests above. Should appear after completing Part 3/4 of the Story of Chapter 8, consisting only 1 stage:
 * 1) Talk to Bill

Assignment
Note: This Side Quest has a different name and a different task depending on the the player's House. Can appear before the completion of Sleep Walker, consisting 2 stages:
 * Gryffindor: "Team Gryffindor"
 * Professor McGonagall informs Jacob's sibling the Gryffindor Keeper misplaced their Broom Wax, she'd like it to be found before their game with the Ravenclaw Quidditch team.
 * Meet with McGonagall
 * Find Broom Wax
 * Ravenclaw: "Take Note"
 * Eliza asks Rowan and Jacob's sibling whether they can help find her missing notes in the Ravenclaw Common Room before her Potions exam.
 * Meet with Eliza
 * Find Eliza's Notes
 * Hufflepuff: "A Sweet Assignment"
 * Philip asks Rowan and Jacob's sibling whether they have some sweets for he wants to repay someone for the kindness they've shown.
 * Meet with Philip
 * Find Sweets
 * Slytherin: "Severe Consequences"
 * Professor Snape is upset with Slytherin about finding out for the supposed bullying Slytherins did after the Gryffindor and Slytherin Quidditch game.
 * Meet with Snape
 * Find vial

Giant Problems
Takes place from Chapter 1 onward, consisting 6 stages: Rubeus Hagrid asks if the player wants to visit him. It needs level 15 in Compassion to unlock.
 * 1) Talk to Hagrid
 * 2) Look for Fang (Artefact Room with Ben)
 * 3) Look for Fang (Potions Classroom with Penny)
 * 4) Look for Fang (Transfiguration Classroom with Rowan)
 * 5) Look for Fang (Library with Bill)
 * 6) Meet Hagrid

Penny for Your Thoughts
Takes place during Chapter 4, consisting 4 stages:
 * 1) Talk to Penny (Great Hall)
 * 2) Meet Penny
 * 3) Talk to Penny (Potions Classroom)
 * 4) Help Penny

Wizarding World Famous
Takes place during Chapter 7, consisting 10 stages:
 * 1) Gather in the Courtyard (I)
 * 2) Listen to Speaker
 * 3) Gather in the Courtyard (II)
 * 4) Impress Rita in Potions Class
 * 5) Impress Rita in Transfiguration
 * 6) Impress Rita in Flying Class
 * 7) Impress Rita in Charms Class
 * 8) Gather in the Training Grounds
 * 9) Talk to Rita
 * 10) Gather in the Great Hall

Bill's Secret
Can appear before the completion of the side quest above, consisting 3 stages:
 * 1) Talk to Bill (I)
 * 2) Meet Emily
 * 3) Talk to Bill (II)

Farewell My Prefect
Can appear before the completion of the two side quests above, consisting 5 stages:
 * 1) Talk to Angelica/Chester/Jane/Felix (House Common Room) (I)
 * 2) Meet Angelica/Chester/Jane/Felix (Training Grounds)
 * 3) Talk to Angelica/Chester/Jane/Felix (Potions Classroom)
 * 4) Meet Angelica/Chester/Jane/Felix (Herbology Classroom)
 * 5) Talk to Angelica/Chester/Jane/Felix (House Common Room) (II)

Nearly Headless Nick
Consisting 6 stages:
 * 1) Talk to Angelica
 * 2) Search for Clues with Nick (Charms Classroom)
 * 3) Search for Clues with Nick (Artefact Room)
 * 4) Search for Clues with Nick (Potions Classroom)
 * 5) Search for Clues with Nick (House Common Room)
 * 6) Meet Angelica

Polyjuice Potion
Consisting of 8 stages: Merula steals Penny's potion and is praised for the work in the Great Hall.
 * 1) Help Penny
 * 2) Meet Penny
 * 3) Search for Ingredients
 * 4) Meet Liz
 * 5) Brew Polyjuice Potion
 * 6) Get Snape's Hair
 * 7) Finish the Polyjuice Potion!
 * 8) Impersonate Snape!

Rita Returns
Takes place during Chapter 10, consisting 6 stages:
 * 1) Talk to Rita Skeeter
 * 2) Visit Hagrid
 * 3) Visit Torvus in the Forest
 * 4) Visit Professor Kettleburn
 * 5) Visit the Restricted Section
 * 6) Meet Dumbledore

The Trouble with Tonks
Takes place during Chapter 11, consisting 6 stages:
 * 1) Talk to Tonks
 * 2) Help Tonks in Herbology
 * 3) Visit Zonko's with Tonks
 * 4) Trick Flich
 * 5) Learn a Spell With Tonks
 * 6) Meet Tonks At Night

Yer a Prefect!
Takes places during Chapter 1 ''if "Become a Prefect!" achievement is completed'', consisting 6 stages:
 * 1) Meet Bill in the Prefects' Bathroom
 * 2) Meet Elora in the Artefact Room
 * 3) Meet Elora on the Training Grounds
 * 4) Check on Tulip's Mischief (Care of Magical Creatures)
 * 5) Go to Dumbledore's Office to discuss punishments
 * 6) Meet the Prefects at The Three Broomsticks

Egg Hunt
Takes place at some point between Year 4 Chapter 16 and Year 5 Chapter 3, consisting 8 stages:
 * 1) Meet Charlie (Great Hall)
 * 2) Meet Charlie (Three Broomsticks)
 * 3) Visit the Red Cap Hole with Charlie
 * 4) Check in with Charlie
 * 5) Work at The Three Broomsticks/Work at Zonko's/Search Filch's Office
 * 6) Meet Alistair
 * 7) Consult Hagrid
 * 8) Follow Hagrid

Crushed
Takes place in Year 5, consisting 7 stages:
 * 1) Investigate the Commotion
 * 2) Talk to Ismelda
 * 3) Help Penny
 * 4) Help Andre
 * 5) Help Liz
 * 6) Tutor Ismelda

Animagus Adventure
Takes place if "Become an Animagus" achievement is completed, consisting of 7 stages: Snape needs ingredients for Memory Potions and only an Animagus can get them discreetly for him.
 * 1) Meet Merula (I)
 * 2) Meet Merula (II)
 * 3) Get Alihotsy and Peppermint
 * 4) Get Eel's Eyes
 * 5) Meet Merula (III)
 * 6) Get Jaberknoll Feathers
 * 7) Meet Merula (IV)

Career Advice

 * 1) Talk to Bill
 * 2) Reach Level 10 Friendship with Bill
 * 3) Go to Professor McGonagall for advice
 * 4) Duel Bill
 * 5) Speak with Professor Sprout
 * 6) Ask Professor Snape about Potions
 * 7) Meet with Bill

Hagrid
This is a list of all side quests that are for building friendships with Hagrid. Each quest focuses on taking care of a specific creature in the Magical Creatures Reserve.

Friendship with Hagrid is established after the completing of the side quest "Fairy Tale" and further side quests increase the player's friendship level with him.

Fairy Tale
Focuses on the Fairy, consisting 8 stages:
 * 1) Meet with Hagrid (Forest)
 * 2) Adopt the Fairy
 * 3) Work with Your Fairy
 * 4) Gain 150 Knowledge Points
 * 5) Meet with Hagrid (Training Grounds)
 * 6) Reach Max Level Trust with the Fairy
 * 7) Rescue the Fairy
 * 8) Release the Fairy

Horsing Around
Focuses on the Abraxan, consisting 10 stages:
 * 1) Meet with Hagrid (Courtyard)
 * 2) Reach Magizoologist Level 3
 * 3) Discuss Abraxans
 * 4) Adopt the Abraxan
 * 5) Introduce Your Abraxan
 * 6) Reach Max Level Trust with the Abraxan
 * 7) Meet with Hagrid (Training Grounds)
 * 8) Gain 150 Courage Points
 * 9) Extract Your Abraxan
 * 10) Meet with Hagrid (Grasslands)

Dark Horse
Focuses on the Thestral, consisting 8 stages:
 * 1) Hear Hagrid's News
 * 2) Adopt the Thestral
 * 3) Prepare Your Thestral
 * 4) Do 15 Social Encounters
 * 5) Confront Merula
 * 6) Reach Max Level Trust with the Thestral
 * 7) Change Merula's Mind
 * 8) Catch up with Hagrid

Achievements
Most Achievements occur as 3-day (72-hour) limited-time events, consisting 4-part Side Quests. Year 3's "Birds Of A Feather" and Year 5's "Ordinary Wizarding Levels" both have an additional 19-hour for its event. Year 4's "Celestial Ball" has an additional 41-hour for its event.

The names of Achievements, as shown in the game's Achievement display, often are different from what were being displayed during the limited-time events, with most of them matching the respective first Side Quests of each Achievements, while Jam City also sometimes additionally refer to them differently, and not the actual names of Achievements:

Party Planner
Occurs specifically after the completion of Chapter 6.

Become an Honorary Rocker
Occurs specifically after the completion of Chapter 4.

Become an Animagus
Occurs specifically after the completion of Chapter 3.

Magical Creatures Everywhere
Occurs specifically after the completion of Chapter 7.

Become a Prefect
Occurs specifically after the completion of Chapter 11.

First Date
Takes place after the "Celestial Ball" and "Making Mischief!" achievement quests.

The Trials of Sir Cadogan
Occurs specifically after the completion of Chapter 3.

Ordinary Wizarding Levels
Occurs specifically after the completion of Chapter 24.

Quidditch
Quidditch tasks were added on 4 September 2019 and are available for players who completed Year 2 Chapter 6.

Chapter 1: Welcome to Quidditch
5 stages: Chapter 2
 * 1) Meet with Penny

6 stages

Chapter 3: Training Days

6 stages:
 * 1) Meet Penny
 * 2) Train with Skye
 * 1) Meet Penny
 * 2) Train with Skye

Charms

 * Attribute: Empathy
 * Rewards: +5 Gems; Usable in Duelling

Potions

 * Attribute: Knowledge
 * Rewards: +5 Gems; Usable in Duelling

Flying

 * Attribute: Courage
 * Rewards: +1 Energy Limit

Transfiguration

 * Attribute: Knowledge
 * Rewards: +5 Gems; Usable in Duelling

Herbology

 * Attribute: Empathy
 * Rewards: +5 Gems

Care of Magical Creatures

 * Attribute: Courage
 * Rewards: +5 Creature Food

Defence Against the Dark Arts

 * Attribute: Courage
 * Rewards: +5 Energy, Useable in Duelling

History of Magic

 * Attribute: Knowledge
 * Rewards: +5 Energy

Divination

 * Attribute: Empathy
 * Rewards: +5 Gems
 * Year 6
 * Tessomancy
 * Palmistry
 * Cartomancy

Students

 * Jacob's sibling - whom the character controls, and whose name, appearance and house are determined by the player

Friends
In addition to these students, Rubeus Hagrid (a staff member) is also on the player's friends list, but cannot be interacted with in the three friendship locations. Friendship with him is established and built with side quests involving the Magical Creatures Reserve (see "Hagrid" section in "Side Quests" for more information).

Other Hogwarts students

 * Prefects
 * Chester Davies - Ravenclaw Prefect
 * Felix Rosier - Slytherin Prefect
 * Angelica Cole - Gryffindor Prefect
 * Jane Court - Hufflepuff Prefect
 * Merula Snyde - Slytherin school bully and enemy of the player
 * Ismelda Murk - friend of Merula Snyde in Slytherin
 * Beatrice Haywood - Penny's little sister 4 years younger than the player
 * Percy Weasley - Bill and Charlie's younger brother
 * Philip and Chauncy - appear for Hufflepuff players only
 * Unidentified Gryffindor Keeper - mentioned for Gryffindor players only
 * Eliza - appears for Ravenclaw players only
 * Emily Tyler - Gryffindor in Bill's year
 * Elora Dunn - Student in the player's house 4 years below them
 * Gryffindor boy who struggled with the Levitation Charm - appears in Charms and History of Magic classes
 * Slytherin boy who drank a botched potion - appears in Potions class
 * Chiara Lobosca - a werewolf girl, Hufflepuff in the player's year
 * Brennan Doyle - a Keeper for the Ravenclaw Quidditch team during the 1989–1990 school year
 * Erika Rath
 * Weird Sisters
 * Myron Wagtail
 * Orsino Thruston
 * Kirley Duke
 * Donaghan Tremlett
 * Billingsley
 * Luisa
 * Thorin
 * Face Paint Kid

Other wizarding schools

 * Aurélie Dumont - student at Beauxbatons Academy of Magic

Mentioned
The following characters never appear in the game, and are not Hogwarts students or staff members during the events of the game. They were mentioned in a trivia hint, were a selectable option in a trivia answer or mentioned by other characters.

Areas

 * Magical Creatures Reserve
 * Grasslands
 * Forest
 * Dark Forest
 * Lake
 * Rocky Mountains
 * Volcanic Pasture
 * Quidditch Stadium
 * Quidditch Changing Rooms
 * Quidditch Stands
 * Quidditch Pitch
 * Commentary Box
 * East Towers, entry available in Year 1 Chapter 2
 * Charms Classroom
 * Astronomy Classroom, entry available in Year 6
 * Astronomy Tower, entry available in Year 6
 * Divination Classroom, entry available in Year 6
 * Defence Against the Dark Arts Classroom, entry available in Year 5 (locked after Chapter 30)
 * Corridor/Peeves' Room, hidden location
 * West Towers, entry available in Year 1 Chapter 2
 * Dumbledore's Office, entry available in Year 2, through invite only
 * Gryffindor House, Gryffindor only
 * Gryffindor Common Room
 * (temporarily available for Slytherin and Ravenclaw players in Year 2 and all players in Year 5 on two occasions and Year 6 on one occasion)
 * Gryffindor Boys' Dormitory
 * Gryffindor Girls' Dormitory
 * Prefects' Bathroom, Prefects' only
 * Ravenclaw House, Ravenclaw only
 * Ravenclaw Common Room
 * (temporarily available for all players in Year 5)
 * Ravenclaw Boys' Dormitory
 * Ravenclaw Girls' Dormitory
 * Filch's Office, entry available in Year 3 (during specific quests)
 * Corridor, hidden location
 * Lower Floor - West, entry available in Year 1 Chapter 2
 * Great Hall
 * Hospital Wing, entry available in Year 2
 * Grand Staircase, entry available in Year 5
 * Courtyard
 * Corridor/Artefact Room
 * Dungeons, entry available in Year 1 Chapter 2
 * Hufflepuff House, Hufflepuff only
 * Hufflepuff Common Room
 * (temporarily available for all players in Year 5)
 * Hufflepuff Boys' Dormitory
 * Hufflepuff Girls' Dormitory
 * Kitchens, hidden location
 * Potions Classroom
 * Slytherin House, Slytherin only
 * Slytherin Common Room
 * (temporarily available for Gryffindor and Hufflepuff players in Year 2 and all players in Year 5)
 * Slytherin Boys' Dormitory
 * Slytherin Girls' Dormitory
 * Duelling Room, entry available when Duelling Club's in session
 * Castle Grounds, entry available in Year 1 Chapter 2
 * Training Grounds
 * Whomping Willow, entry available in Year 6
 * Hagrid's Hut, entry available in Year 4, through invite only
 * Owlery, entry available in Year 6
 * Care of Magical Creatures, entry available in Year 4
 * Lower Floor - East, entry available in Year 2
 * Transfiguration Classroom
 * Library, entry available in Year 3
 * Restricted Section, hidden location
 * History of Magic Classroom, entry available in Year 5
 * Herbology Classroom, entry available in Year 3
 * Corridor, hidden location
 * Hogsmeade, entry available in Year 3 Chapter 3 (can be temporarily accessed during the Giant Problems side quest)
 * Hogsmeade Train Station, hidden location
 * Three Broomsticks
 * Honeydukes, entry available in Year 7
 * Madam Puddifoot's Tea Shop, hidden location
 * Maestro's Music Shop, entry available in Year 7
 * Zonko's Joke Shop
 * Hog's Head Inn, entry available in Year 5 (specific tasks only)
 * Forbidden Forest, entry available in Year 4 Chapter 6
 * Forest Grove
 * Spider's Lair, entry available in Year 4 (specific tasks only)
 * Forest Lake, entry available in Year 7
 * Red Cap's Hole, entry available in Year 4 (specific tasks only)
 * Centaur Camp, entry available in Year 6 (specific tasks only)
 * Diagon Alley, first available in Year 1 Chapter 1, later unlocked in Year 5 Chapter 10
 * Ollivanders
 * Flourish and Blotts
 * Gringotts, entry available in Year 7
 * Leaky Cauldron, entry available in Year 6
 * Knockturn Alley, entry available in Year 5 (specific tasks only)

Behind the scenes

 * It was released on the 24th of April in some countries.
 * Side Quests can carry over to the next school Year, though it is suggested to complete them during the Year they were released in, in order to keep the plot within continuity.
 * While players are only able to interactively participate in Charms, Potions, and Flying during year 1, Transfiguration as an addition in year 2, Herbology as an addition in year 3; the characters of the players are actually attending all canon classes.
 * In Year 1 for example, if the player is in Hufflepuff, Rowan Khanna will mention Herbology and say it would have been more enjoyable were they not having to worry about a murderous plant. It was later brought up in the Side Quests of Chapter 8 in Year 1 in Hufflepuff's house meeting, where they discussed how to help their Head of House, Pomona Sprout, amongst other things. Depending on the players' choice, one conclusion was to help out their Professor clean up after their class.
 * In Year 2 Chapter 5, when visiting Rowan in the Hospital Wing, Jacob's sibling brought their star chart from Astronomy Class.
 * The player may create their own name if they wish, but there are player names which are banned for unknown reasons, including the name Roland. However, should one feel that their names may be mistakenly excluded, the game developer, Jam City, stated that they welcome the feedback so they can take a closer look.
 * Interestingly, the name "Jacob" is not banned, meaning that both the player and his/her brother can share the same name.
 * On the leaderboard, the majority of the names of other students and their appearance are randomised for that player, and the only names which are the same for everyone will be for game-playing characters like Merula Snyde or Ben Copper. The randomised names are similar and can even be the same, with popular surnames being Nguyen, Hernandez, Miller, Young, and Carter.
 * The following characters were attending Hogwarts or would have begun attending Hogwarts during the years the player attended from 1984 until 1991. However, they have not been mentioned in relation to the game or are known to appear in the game: Gwenog Jones (graduated 1986/1987), Marcus Flint (Sorted 1986), Penelope Clearwater and Oliver Wood (Sorted 1987), Roger Davies, Angelina Johnson, Lee Jordan, Adrian Pucey, Alicia Spinnet, Patricia Stimpson, and Kenneth Towler (Sorted 1989).
 * There were a few other characters from Harry Potter's early years at Hogwarts who would have attended around the same time including Quidditch players and Prefects like Terence Higgs and Robert Hilliard.
 * Based solely on their birth year (though it is not known if they attended Hogwarts), these characters could also have attended Hogwarts during that time: Dunbar Oglethorpe (b. 1968), Heathcote Barbary (b. 1974), Herman Wintringham (b. 1974), Stanley Shunpike (b. 1974/1975), and Gideon Crumb (b. 1975).
 * Weird Sisters members Myron Wagtail (b. 1970), Kirley Duke (b. 1971), and Orsino Thruston (b. 1976) previously had not been confirmed having attended Hogwarts; their schooling is now confirmed in Year Two "Become a Rockstar!" Achievement.
 * The additional Hogwarts staff from 1984 would have been composed of: Quirinus Quirrell (Muggle Studies, at least in the late 1980s). It is unknown if Bathsheda Babbling already taught Study of Ancient Runes.
 * Even though the Duelling Club has been confirmed to feature in the game, it was originally created by Gilderoy Lockhart in the 1992–1993 school year. It is possible that several different Duelling Clubs were founded and dissolved throughout the history of Hogwarts.
 * In Chapter 1 of Year 2, the player will be told they need to sneak into another House's common room to find an object. The House common room they will sneak into will be different for every House. It could be randomised and ensures the player simply went to another House’s common room. If there's a pattern, it appears Ravenclaw and Slytherin will sneak into the Gryffindor common room, and Hufflepuff and Gryffindor will sneak into the Slytherin common room.
 * During Year 1, Professor Snape is mentioned to be petitioning for the Defence Against the Dark Arts position. The current DADA teacher was having trouble, and the curse on the position is mentioned by Rowan.
 * Within the APK file of the game there exist various images of shapes that correspond to the shapes one must draw in order to cast spells. Many of these shapes are different from the shapes that are used in the final game. For example, a shape like a number four is used to represent Alohomora (similar to Wonderbook: Book of Spells), while the game uses a more circular gesture.
 * In Hogsmeade, some shop names are shortened:
 * Three Broomsticks Inn as simply "Three Broomsticks"
 * Dominic Maestro's Music Shop as simply "Maestro's Music Shop"
 * This didn't occur in the Spanish version.
 * The kitchens were previously shown as a location unlocked in Year 5 but the location was changed into a hidden location.
 * In Harry Potter and the Chamber of Secrets, in Chapter 9: The Writing on the Wall, Ron tells Harry "I think someone told me a story about a secret chamber at Hogwarts once. Might have been Bill." It could be that Bill has told Ron about the cursed vaults at some point between the 1985–1986 school year and the 1992–1993 school year.

Fixed errors

 * When Year 3 was first released, in the friends section, Bill Weasley's year showed up as 3, even though it was supposed to be 5, and was correctly shown on the leaderboard. It was resolved in a couple of days.
 * Tonks should be a friend to the player upon the completion of Chapter 1 in Year 3, yet various players for unknown reasons were unable to unlock her as friends, even completing to the point of waiting for the release of Year 4. This error limited those players, making them unable to pick Tonks to accompany them to the Vault of Fear, forcing them to choose only between Bill Weasley and Rowan Khanna. It was resolved on 5 June 2018.
 * Andre Egwu and Ismelda Murk were initially missing from the Leaderboard; both were added after the update on 14 June 2018.
 * Ismelda's surname was initially incorrectly shown as "Placeholder," but was corrected after the update on 21 June 2018.
 * Liz Tuttle was initially missing from the Leaderboard; added after the update on 16 August 2018.
 * Side Quest "Nearly Headless Nick":
 * Sometimes appears four times in the side quest section, sometimes not at all.
 * Sometimes, after reopening the app while waiting for a task, the ending cutscene of the previous task is shown again, although the waiting time does not reset, indicating that this is not due to the game not properly saving.
 * Disappeared shortly after it was added, making it impossible for players to complete unless they were quick.
 * All the above was later fixed on 28 June 2018.
 * In Chapter 14 of Year 4, when the player learned Arania Exumai, it remained locked. This was fixed shortly afterwards.
 * In Chapter 15 of Year 4, Hagrid referred to Jacob's sibling as "Firstname" instead of their actual first name. This was fixed shortly afterwards.
 * After completing Chapter 14, Hagrid's Hut showed an "Explore" option but tapping it lead to the Courtyard. It was later fixed so tapping Explore lead to Hagrid's Hut instead.
 * For a short while, Defence Against the Dark Arts classes gave empathy instead of courage. The Ghoul lesson, however, already gave courage when the class was added.
 * 5-star Defence Against the Dark Arts classes could be completed with just 45 energy in total, giving players a faster way to earn house points and crests for special events. This was, however, fixed after around a week.
 * Chapter 3 of Year 5 was added early, and the first quest got completed with just one action. If a player managed to enter the kitchens, they talking about Mundungus Fletcher, something which should have only happened in Chapter 8. This Chapter was later removed and players were sent back to task 5 of Chapter 2, and were given 150 energy in return. The Chapter was added back two weeks later, and this time the glitches were fixed.
 * For a short window, an achievement named "Howling Hallowe'en" was briefly located in Year 1, with Fenrir Greyback misspelled as "Fenrir Greenback" in its description, though the quest was no longer visible shortly afterwards. This typo was fixed and the achievement was added back to Year 1 on 18 October 2018.
 * Prior to the release of the first part of year 5 friend characters whose standard outfits differed from the Hogwarts uniform would wear their standard outfits when appearing in classes rather than the uniform (even though this would have got them in trouble in real life), this was fixed upon release of the start of year five so characters always wear their uniform in classes.
 * In Liz Tuttle's Year 4 quiz, when asked which object was found in the Forest Vault, dragon portrait used to be an incorrect answer choice despite it being true. This was later corrected.
 * When Muffliato was first featured as an upcoming Charms lesson in Year 5, around 7 March, 2019, it was incorrectly spelled as Muffilato; this was corrected on 21 March, 2019.
 * In the classes section, the icon for Divinations was the same as for History of Magic. This was fixed on 25 July, 2019.
 * Shortly after the start of Year 6, players received notifications for a quest called "PEN-FRIEND OR FOE" or "Y6_TLSQBeauxbatonsC1" (the latter was likely a code name for the former), but no signs of a new time limited side quest.
 * Strangely, when the side quest actually came out, it was actually revealed to be Year 2 rather than Year 6. This may indicate that the quest was originally supposed to take place in Year 6, but was later changed to take place in Year 2 instead.
 * After the player reached level 46/47/48, the XP bar no longer increased, but it did not say it is the maximum level like it did previously, as maximum levels have been increased multiple times. This mistake was later fixed in around late July or early August 2019.

Overall

 * The world-class broomstick Firebolt was released in 1993, yet during Flying Classes as early in 1984, Firebolt could be mentioned in a few situations, predating the broom's canon existence by almost a decade:
 * The question "A Firebolt is a type of what?" could be asked.
 * Rolanda Hooch provides a trivia hint, telling the player to familiarise with "Cleansweep, Comet, Nimbus and Firebolt."
 * A reduced statement "Cleansweep, Comet and Nimbus" is now offered, though the one with Firebolt is still around.
 * The question "Which of these is not a broom?" could be asked, Firebolt being one of the choices.
 * A couple of known students are missing from the Leaderboard, including:
 * Badeea Ali, Diego Caplan, Jae Kim, Chiara Lobosca and Talbott Winger (should appear in Year 1 onward)
 * Angelica Cole, Chester Davies, Jane Court, and Felix Rosier (should appear in Years 1-3)
 * Billingsley (should at least appear in Years 1-5)
 * Emily Tyler (should appear in Years 1-5)
 * Brennan Doyle (should appear in Years 1-6)
 * Eliza (should appear in Year 2 onward;) Chauncy and Philip (should at least appear in Year 2)
 * Luisa (should at least appear in Year 3)
 * Penelope Clearwater, Marcus Flint, Percy Weasley and Oliver Wood (should appear in Year 4 onward)
 * Lucian Bole, Peregrine Derrick, Elora Dunn and Beatrice Haywood (should appear in Year 5 onward)
 * Roger Davies, Cedric Diggory, Angelina Johnson, Lee Jordan, Adrian Pucey, Alicia Spinnet, Patricia Stimpson, Kenneth Towler, Cassius Warrington, Fred Weasley and George Weasley (should appear in Year 6 onward)
 * Merula Snyde and Ismelda Murk have double entries on the Leaderboard after the update on 2 May, 2019.
 * The question on who the Divination Professor was could be asked, and one of the options was Professor Umbridge. The player character's wouldn't receive that as an option, because Professor Umbridge worked at the Ministry of Magic and would not become the unlikely Defence Against the Dark Arts Professor until 1995.
 * Though Severus Snape gave a speech about "little foolish wand-waving [in Potions class]" during his introduction for the subject for the 1991–1992 school year, in the game, he clearly used his wand to move phials of ingredients to his potions when he demonstrates. The students, on the other hand, add the same ingredients by hand, though in certain situation, they would cast Lumos in order to properly look through the shelves to search for ingredients.
 * It is possible that Snape did not consider this kind of magic foolish, or he was referring to subjects like Charms, where amateur students wave their wand around without success towards creating the spell. Or, he changed his teaching method at some point before the 1991–1992 school year.
 * In Defence Against the Dark Arts, Professor Rakepick occasionally asks a question involving Horcruxes. Since Horcruxes are extremely dark magic and not known to common Wizarding knowledge, it would be unlikely that she would have Horcruxes in her curriculum. Even if she wanted to (which is likely, given her nature), she would likely get into huge trouble if anyone tells.
 * At the end of each year in the game, the House Cup is given out to the house with the most House points. While any house can win the cup in all of the years in the game, it is mentioned in PS undefined that Slytherin has won the cup for six straight years, from the 1985–1986 school year to the 1990 to 1991 school year, which take place during Jacob's sibling's second to seventh years. This would also mean that Slytherin didn't win the cup in the 1984–1985 school year, which would take place during Jacob's sibling's first year. However, in the game, Slytherin can win the House Cup in that year.
 * All classes contain students from a specific House instead of having two Houses in a class (not including Jacob's sibling and Rowan)
 * All the Slytherin students are in Potions.
 * All the Gryffindor students are in Charms.
 * All the Ravenclaw students are in Transfiguration
 * All the Hufflepuff students are in Herbology.
 * Flying Class, Care for Magical Creatures, Defence against the Dark Arts, and History of Magic are the only exceptions for there are students from every House (although Care of Magical Creatures shows a Slytherin majority, Charlie Weasley being the most notable exception).
 * Ben and Penny were present in Care for Magical Creatures' first lesson but then disappeared after that, for they don't show up in any classes after that.
 * In Potions Class, Jacob's sibling and Merula Snyde appear to share a cauldron. However, they are mentioned to brew potions separately.
 * The hourglasses in the Great Hall do not accurately show the House Cup rankings.
 * McGonagall is misspelled "McGongall" in some of Bill Weasley's friendship activities.
 * Players on the leaderboard with clothes from events with clothing that appears different based on the player's house have clothes of the player's house regardless of the house they're in.
 * Only one male fifth year student and one female fifth year student from each house can become Prefect each year. However, if Jacob's sibling is a male fifth year Gryffindor, they can become a Prefect despite Charlie Weasley, another male fifth year Gryffindor, also becoming a Prefect in the same year.

Quidditch

 * In Chapter 1, Penny states that she and Jacob's sibling are in the section of whichever house the player is in, but they are always shown to be in Hufflepuff's section.
 * In Season 1 Chapter 3, it is stated that no games have been played that year. However, if the quest is meant to take place after Year 2 Chapter 6 (as Quidditch is specifically unlocked at that point), causes a contradiction, as the Gryffindor vs. Slytherin match is played in Year 2 Chapter 3.
 * If Jacob's sibling becomes a permanent member of a Quidditch team in Year 5 or earlier, it conflicts with the fact that Jacob's sibling has to sneak into the common rooms during Quidditch matches in Year 5 Chapter 21.

Year One

 * In Chapter 2, Rowan and the player discuss their timetable when they first get to their Common Room on 1 September, but students are not supposed to get their timetables until the next day. This might not necessarily be a mistake, however. This interaction could very well take place on 2 September, which was a Sunday in 1984, while their classes started on Monday, 3 September.
 * Achievement "Party Planner" and its Side Quests seemingly contains continuity errors along with other mistakes, as documented here.
 * Achievement "Howling Hallowe'en" and its Side Quests
 * Fenrir Greyback remained in human form while his two companions were in werewolf forms; Chiara Lobosca was revealed to be a werewolf as well, yet also remained in her human form in the same scene.
 * Penny revealed her fear for werewolves and having a friend killed by one, which originally debut respectively in Chapter 1 of Year 3 and Side Quest "Penny for Your Thoughts", both over at least one year in the future of this Year 1 Achievement.
 * Even if the event is meant to take place after "Penny for your thoughts", it could still be considered a mistake as Penny could drink the Forgetfulness Potion, causing her to forget about this event.
 * Fenrir Greyback was noted to be strong, yet Jacob's sibling could easily defeat him in a duel.
 * If Achievement "Howling Hallowe'en" is played during the player's second year when Ben is missing, Ben will be seen in the Charms Classroom when you interview Professor Flitwick. This is one of those Gameplay and Story Segregation situation.
 * Liz Tuttle, Barnaby Lee, and Ismelda Murk are all visible and can be interacted with in certain tasks. The player meets all three of them in Year 3, as this is a Year 1 Achievement the player wouldn't have met them and shouldn't know who they are. Barnaby is also mentioned several times as if the player knows him as his uncle Cecil Lee plays a role in this event, yet as mentioned the player should have no clue who Barnaby is.
 * Achievement "Christmas at Hogwarts" and its Side Quests
 * The achievement is placed in Year 1, but everything in the event seems to imply it takes place in Year 3 or later.
 * Jacob's sibling already knows Bill, Tonks and Charlie.
 * Prefect badges appear based on the player's progress.
 * Penny mentions Scarlett, a mention which only makes sense if it happened before Side Quest "Penny for Your Thoughts" took place (sometime after the first herbology class during the 1986–1987 school year,) or if the player completed the said quest and persuaded Penny to not drink the Forgetfulness Potion.


 * Information on whether Percy Weasley is already attending Hogwarts seems to be contradicting. Molly mentions Percy being at home alongside his younger siblings (Bill and Charlie specifically had to stay at Hogwarts due to the mess at the Burrow) but the player only wonders about meeting Fred, George, Ron and Ginny.

Year Two

 * In Chapter 1, Professor McGonagall will say Ben was upset about what happened to him when he was trapped in the cursed ice; this is referring to the arc taking place in Chapter 8 of Year 1, in which the player decides between bringing Penny or Ben to break into the Locked Room alongside Rowan. They will be trapped by the cursed ice and the player saves them. However, if the player had taken Penny instead of Ben, Ben wouldn't have even gone there. Therefore, what McGonagall says makes no sense in this scenario.
 * In Chapter 3, if the player is in Hufflepuff or Gryffindor, they will sneak into the Slytherin Common Room to search for the Black Quill, and eventually be confronted upon leaving, by Felix Rosier, who brought along Severus Snape. However, Gemma Farley, when she became the Prefect to welcome Slytherin first years, informed them that no-one had knowingly snuck into the Slytherin Common Room for more than seven centuries. The game takes place in 1985, and Jacob's sibling was caught sneaking out of the room, contradicting Gemma, unless Snape and Rosier never told anyone.
 * In the beginning of Chapter 5, Rowan is in the Hospital Wing due to being hit by the cursed ice when searching for the Cursed Vaults. Rowan appears in classes during that chapter even when they were supposedly being hospitalised. It is later explained that Pomfrey helped Rowan get to Potions class, even though Jacob's sibling was unaware of this at the time.
 * Rowan attended Flying class immediately following their interaction at the Hospital Wing where Rowan told the player to attend the class alone, since they were not allowed to leave yet and they would send an owl when they were allowed. Rowan then appears in the class anyway.
 * The same kind of thing happens at the beginning of Year 2. Ben Copper immediately went missing at the beginning of the school year when he arrived at the school. If the player's in Gryffindor, they can continue to have interactions with Ben in the common room and throughout side quests even though they are looking for him in the main story.
 * During Flying class, an action that requires tapping Penny has the text "Listen to Ben", even if Ben is not seen at all.
 * In Side Quest "Help Hagrid!," when the player helps save Fang from Devil's Snare, Hagrid asks the player what he should name the dog and says he's a new puppy. However, Fang could be found in the game from the beginning in Year 1 which was a year ago by that point in the game. Fang wouldn't be new by then and it makes no sense why Hagrid would wait that long before naming him.
 * In Side Quest "Sleep Walker," the sleep walking girl's appearance and house are inconsistent.
 * In Chapter 9, when Hagrid was relaying how bad the cursed ice had spread throughout the school, Professor Sinistra's surname was misspelled as "Sinestra."
 * Though her surname was spelled correctly in the in-class question "Who is the Astronomy professor?".
 * In Chapter 10, the password Professor McGonagall used to open Dumbledore's office was "Iced Mice," when the correct name of the sweet in question is Ice Mice.
 * Achievement "Become an Honorary Rocker" and its Side Quests
 * This quest occurs after the completion of Chapter 4, but the player only befriends Bill after completing Chapter 6, which seems odd, as the side quest includes options which are only available by having a certain friendship level with Bill.
 * Orsino Thruston is already at Hogwarts. However, he was born in 1976, meaning he should not start at Hogwarts until at least Year 4.
 * In the Artefact Room, the player tells the player (using the player character's name) to keep going. It seems more reasonable that Myron, the only other person in the room, is supposed to say the line instead.
 * Some characters (such as Barnaby Lee, Nymphadora Tonks, Ismelda Murk, Talbott Winger, Badeea Ali, Diego Caplan, Jae Kim, Liz Tuttle, Tulip Karasu and Charlie Weasley) that the player was established to not having met during Year Two are visible during the concert section. Whilst it is possible for these characters to attend the concert without having personally met the player, some such as Barnaby and Tonks can be interacted with during this section as if the player knows them, however as this is set prior to the player meeting them they would not know who these people are.
 * Achievement "Hosting the Beauxbatons" and its Side Quests
 * When Rowan first talks in the quest, a voice clip from Jae Kim is used instead.

Year Three

 * In Side Quest "Giant Problems," when Fang needed to be found, the player can continue gaining one energy by clicking on the branch on the path to Hagrid's Hut, which makes the missing Fang appear.
 * Jacob's sibling can access Hogsmeade in Chapter 1 if choosing to start the "Giant Problems" Side Quest. However, in Chapter 2, it will appear as if Jacob's sibling had never been to Hogsmeade.
 * In Chapter 2, Jacob's sibling and Hagrid will talk about the Boggart they found. Jacob's sibling will ask Hagrid whether he's begun Defence Against the Dark Arts class yet, which makes no sense because Hagrid no longer attends school. The line was probably intended for Hagrid to say, but the game labelled the speaker as Jacob's sibling ("You") by accident.
 * In Chapter 4, a background character at Zonko's Joke Shop is called "First-Year Boy". First-years and second-years are not allowed to go to Hogsmeade. Though it is possible that he managed to sneak into the village, like Harry Potter did when he didn't get the permission.
 * In Side Quest "Farewell My Prefect," when brewing the Babbling Beverage and choosing to read the instructions, the player mentions Penny being there. Jacob's sibling and the Prefect are the only two in the Potions Classroom at the moment.
 * Mice to Snuffboxes is learned in Transfiguration Class in Year 3. However, during the 1991–1992 school year, Harry and his Transfiguration Class learns this same spell in their first year and even have it on their practical exam.
 * It could be that Professor McGonagall changed the order that she taught certain spells between Jacob's sibling's time at Hogwarts and Harry's time at Hogwarts.
 * When Year 3 is completed, it is shown as "Chapter 8 completed" when it should be Chapter 11. For players who have reached Chapter 11 before its release on 7 June 2018, they do not get to see the official chapter title.
 * Achievement "Become an Animagus!" and its Side Quests
 * The quest is supposed to happen directly after Chapter 3. However, at that point, the player is not yet friends with Barnaby Lee, but he is their friend during the quest.
 * If Jacob's sibling is in Hufflepuff, the exclamation of surprise upon seeing Penny Haywood in their Potions class would make no sense, for Penny should have been in the same class to begin with.
 * During the Gobstones game with Talbott Winger, Charlie Weasley's voice clips are used.
 * Achievement "The Frog Choir" and its Side Quests
 * The achievement is placed in Year 3, however, Chester is shown to be no longer attending Hogwarts, when he is only supposed to be graduating at the end of that year.
 * Achievement Quest "Flying Solo" abd its Side Quests
 * At one point, Jacob's sibling mentions being an unregistered Animagus even if they chose to register (although another point in the side quest takes this choice into account).
 * Talbott fakes a letter from Rakepick to get Merula to the Courtyard, but as the quest is set in Year 3, Rakepick should not be at Hogwarts yet.

Year Four

 * In Chapter 6, if both the player and Rowan are female when Jacob’s sibling tries to convince Rowan to go to the Forbidden Forest with them, she says that she might get detention and that it would decrease her chances of becoming Head Boy, even though this Rowan is a girl and would therefore aim to be Head Girl instead.
 * In Chapter 12, Jacob's sibling talks to Tulip as if she is one of the sleepwalking students in the Hospital Wing, even though Tulip isn't afflicted with the curse at the moment and isn't even in the room.
 * Side Quest "The Trouble with Tonks"
 * In the library, a speech bubble is shown above nothing. When tapped, it shows the name Andre, even though Andre is nowhere to be seen.
 * It is mentioned that Bellatrix Lestrange and Filch did not get along while she was attending Hogwarts, but Bellatrix graduated in 1969 or 1970 while Filch only started working at Hogwarts in around 1973.
 * On the training grounds, two models of Tonks briefly appear before the beginning of the duel.
 * In Chapter 16, if the player tries to convince Bill to join them, the text says the player made Barnaby feel better instead of Bill whenever the right answer is chosen.
 * If the player was confirmed to be selected as a Prefect in the following year, some characters on the leaderboard can be seen wearing Prefect badges, even if they are below Year 4. The player's character would also have the badge on display when donning school uniform, even though they technically haven't actually become one at that point.
 * The player will also wear a Prefect badge in all side quests taking before Year 4 in parts where they are forced to wear robes.
 * In the Patronus achievement quest, the player has the ability to use Legilimency on Merula despite the fact that they do not know they have the ability until their fifth year.
 * Achievement Quest "First Date"
 * Ismelda mentions what happened in the "Crushed" side quest, which takes place a year later.
 * Charlie mentions Frog Spawn Soap ending up in his bath, which happens in Year 5.
 * If MC chooses to date Penny and to fancy Penny in Year 5, the reveal seems to be surprising despite the fact that the two already went on a date (although at that point in Year 5, the game had no way of knowing if the two had already been on a date).

Year Five

 * For all of Year 5, Bill is still wearing the Prefect badge, when, as a Head Boy, he should be wearing the Head Boy badge instead.
 * Side Quest "Yer a Prefect"
 * On the training grounds, two models of Elora Dunn briefly appear before the beginning of the duel.
 * During the meeting of the Prefects in the Three Broomsticks Inn, Bill Weasley states that he chose to not wear his robes and Prefect badge to the meeting. However, Bill is still wearing his Prefect badge at the meeting.
 * For some players, Beatrice Haywood's head and arms appear detached from the rest of her body when she is stuck in a portrait.
 * Jae Kim and Badeea Ali can be interacted with in classes as early as Year 5 Chapter 1 but when the player meets them in the story, they are complete strangers.
 * In Chapter 3 of Year 5, Hufflepuff students can be seen attending Charms class alongside Gryffindors and Rowan, even if the player is in a house other than Hufflepuff.
 * The player is told to get a specific outfit for Knockturn Alley. However, in Chapter 10, the person who comes alongside Jacob's sibling wears their normal outfit instead of a disguise.
 * In Chapter 10, Ollivander says the player has the Hornbeam wand, regardless of which of the three wands they got in Year 1 Chapter 1.
 * In the Portuguese translation, the information given by Ollivander is even more incorrect. He refers to the wand as a birch wand, which was not one of the original three options. He also gives the wand's length in centimetres, which contradicts the fact that wizards never went through the process of metrication.
 * The latter, however, is not exactly a mistake as unit changes have been made in previously translated Harry Potter material as well.
 * In the "Animagus Adventure" side quest, the name of the Jobberknoll is occasionally misspelled as "Jabberknoll."
 * In Chapter 14, Rowan mentions that they cannot wait to see their first Yeti. However, in the Christmas side quest, Rowan was with the player when they fought the Yeti.
 * In Chapter 16, Rakepick breaks the player's wand but they continue to use it in classes.
 * In Chapter 17 onwards, the player uses their new wand. This, however, creates a new problem, which is that the player uses their new wand in any new past side quests as well.
 * In Chapter 21, if the player is not a Gryffindor and chooses Merula to go to the common rooms, the two get into the Gryffindor Common Room without any help despite neither being in Gryffindor.
 * In Chapter 21, there is a Gryffindor vs. Ravenclaw Quidditch match going on. However, there was already a Gryffindor vs. Ravenclaw Quidditch match in Chapter 12.
 * The Ordinary Wizarding Level Achievement Quest happens after Chapter 24. There are, however, multiple classes in Chapter 25 onwards, indicating that the achievement quest takes place later. In Chapter 27, it is stated that the O.W.L. quest has already happened, but there are still multiple classes.
 * The Draught of Peace is listed among Year 5 Options, but is never marked as completed. It is likely it is meant to be completed in Chapter 5, where Penny brews it.

Year 6

 * Despite the fact that the characters are now meant to take N.E.W.T. level subjects, the classes appear identical to the ones in earlier years. For example, in Charms class, all students are from Gryffindor and the player's house. Nymphadora Tonks, a Hufflepuff, had to take N.E.W.T. level Charms in order to become an Auror, but is absent.
 * The Divination class at the end of the chapter appears to be their first Divination class ever, but as they are sixth years, they should have already had Divination for three years.
 * The player continues taking Potions even if they received an O.W.L. grade lower than Outstanding, but Snape only allows students who got an O to continue Potions. Similarly, the player continues taking other subjects (such as Transfiguration) even with an Acceptable grade even if the requirement is Exceeds Expectations.
 * In Chapter 5, Liz calls Sir Ribbithe a toad, but previously, he was referred to as a frog.

Notes and references
de:Harry Potter: Hogwarts Mystery de2:Harry Potter: Hogwarts Mystery es:Harry Potter: Hogwarts Mystery fr:Harry Potter : Secret à Poudlard ja:ハリー・ポッター:ホグワーツの謎 no:Harry Potter: Hogwarts Mystery pl:Harry Potter: Hogwarts Mystery pt-br:Harry Potter: Hogwarts Mystery ru:Harry Potter: Hogwarts Mystery