Each Special Adventure has certain requirements to trigger: a specific Chapter/Year in the main storyline, completion of another quest, or a certain time of year (for Seasonal Adventures). Below you'll find the list of all the Special Adventures in the game, as well as their unlock points.

PLEASE NOTE: You can have only one Adventure active at a time, and the Adventure you receive next may vary depending on which Adventures you have in your quest queue. There is a 1-day cooldown timer in-between such quests, meaning your next available Adventure will typically start 24 hours after you complete the previous one. If you have multiple Adventures in your quest queue, we recommend refraining from moving through the main storyline while you wait for them to trigger, as the further you progress in the game, the more new Adventures will unlock for you. These new Adventures will be added to your quest queue, increasing the backlog of available quests.

ADVENTURES AT HOGWARTS

YEAR 2
Chapter 1: "McGonagall's Honour" 
Chapter 3: "The Treasure Hunt"
Chapter 4: "A Special Celebration Of Hogwarts Teachers", "Party Planner" (only in Memory Book)
Chapter 5: "The Weird Sisters" (only in Memory Book)
Chapter 6: "Lone Wolf", "The Lost Prophecy"
Chapter 7: "Hosting the Beauxbatons", "Meet the Malfoys"
Chapter 8: "The Case of the Missing Pets", "A Son of Durmstrang"

YEAR 3
Chapter 1: "A Day in Diagon Alley", "Andromeda's Hogwarts Homecoming", "New Arrivals"
Chapter 2: "Flume's Clues", "Become an Animagus", "Welcome to the Sphinx Club" (need Rank 5 in Sphinx Club), "A Dragon's Quest" (need Rank 5 in Dragon Club), "A Bad Omen" (need Rank 5 in Hippogriff Club)
Chapter 3: "Career Days at Hogwarts"
Chapter 4: "House Points"; "Hogwarts Trivia"
Chapter 5: "Gryffindor Celebration", "Hufflepuff Celebration", "The Wisdom of Ravenclaw", "The Frog Choir"
Chapter 6: "Knarl's Big Day"
Chapter 7: "The Sorcerer's Olympiad", "A Letter From Hogwarts"
Chapter 8: "A Scandal In Hogsmeade", "A Gathering of Old Friends", "Family Feast", "The Wonderful World of Wands"
Chapter 9: "Slytherin Celebration", "Shadows of the Dark Lord", "Birds Of A Feather" (need to complete the "Animagus" quest first)
Chapter 10: "The Hero of Hogwarts", "Happy Anniversary, Hogwarts"

YEAR 4
Chapter 2: "Conjure a Patronus"
Chapter 3: "Search for the Mirror of Erised"
Chapter 4: "Hogsmeade Festival"
Chapter 5: "Celestial Ball"
Chapter 6: "Saving Zonko's"
Chapter 8: "First Date"
Chapter 10: "Party at the Weasleys!"
Chapter 11: "Welcome to the Slug Club"
Chapter 12: "Become a Prefect"
Chapter 14: "Magical Creatures Everywhere"
Chapter 17: "Torvus & The Troubled Forest", "Valentine's Day", "Making Mischief"

YEAR 5
Chapter 1: "Out of Sorts"
Chapter 4: "The Tournament of Clubs", "The Trials of Sir Cadogan"
Chapter 6: "Festival Fun"
Chapter 8: "The All-Wizard Tournament"
Chapter 10: "Valentine's Day Ball"
Chapter 11: "The Valentine's Day Masquerade"
Chapter 13: "An Enchanted Kiss", "Ticket To Love"
Chapter 15: "The Quibbler: Fight For The Front Page"
Chapter 18: "The Curse-Breaker's Gambit"
Chapter 19: "The Great Hogwarts Cook-Off", "Celestina's New Groove"
Chapter 25: "Love Story", "Ordinary Wizarding Levels"
Chapter 31: "Portrait Panic"

YEAR 6
Chapter 6: "The Dragon's Treasure"
Chapter 7: "The Rise Of A Curse-Breaker"
Chapter 26: "Head Boys and Girls"

YEAR 7
Chapter 41: "Charmed" (NEWTs on Charms)
Chapter 42: "Trouble Brewing" (NEWTs on Potions)
Chapter 43: "Transfigure It Out" (NEWTs on Transfiguration)
Chapter 44: "No Laughing Organic Matter" (NEWTs on Herbology)
Chapter 46: "Charlie's Challenge" (NEWTs on Care of Magical Creatures)
Chapter 53: "Nastily Exhausting Wizarding Tests" 

ADVENTURES BEYOND HOGWARTS

VOLUME 1
Chapter 4: "Apparition Is Your Mission"
Chapter 5: "School Day Nostalgia"
Chapter 6: "Auror Case File: Grindewald's Wand"
Chapter 7: "Protecting the Stone" Chapter 15: "Norbert's Transport"
Chapter 25: "Flight of the Weasleys"

VOLUME 2
Chapter 5: "Dreams Of Rowan"

SEASONAL ADVENTURES
(these quests can only be played during their respective calendar months, and will trigger regardless of your current progress as long as you have reached their triggering point)

OCTOBER
Year 1: "Howling Hallowe'en" (Ch8)
Year 2: "Duelling Deathday Parties" (Ch2)
Year 3: "Secrets of Godric's Hollow" (Ch3), "The Tale of Pumpkin Johnny" (Ch8), "Pumpkin Johnny Rises!" (Ch9)
Beyond Volume 1: "Harry's Troll Problem" (Ch5),
"A Mysterious Hallowe'en Party" (Ch6)

DECEMBER
Year 1: "Christmas at Hogwarts" (Ch8)
Year 2: "Christmas at the Burrow" (Ch3), "Holidays at Hogwarts" (Ch4), "Dumbledore's Christmas Wish" (Ch6), "Hagrid's Holiday" (Ch7)
Year 3: "The Gift Of Gratitude" (Ch5)
Beyond Volume 1: "A Weasley Christmas Vacation" (Ch11)

FEBRUARY
Year 5: "The Curse of Love" (Ch6)
Beyond Volume 1: "The Adult's Guide to Dating" (Ch12) 

QUIDDITCH ADVENTURES
(these quests are not connected with the main story progression and will only appear once you reach the corresponding Chapter in the Quidditch storyline)

SEASON 1
Quidditch Chapter 9: "Searching For A Comet"
Quidditch Chapter 12: "The First Quidditch Cup"

SEASON 2
Quidditch Chapter 9: "Rivalry, Respect, and Rath"
Quidditch Chapter 12: "The Second Quidditch Cup"

SEASON 3
Quidditch Chapter 9: "The Legendary Snitch of Hogsmeade"
Quidditch Chapter 12: "The Third Quidditch Cup"

SEASON 4
Quidditch Chapter 12: "The Fourth Quidditch Cup"