Use a Weasley box with every Weasley
Defeat every Harry freeplay variant as Lord Voldemort
Defeat Bellatrix with Neville (Waiter) in a duel
Complete the game to 100% (Single Player Only)
Complete the Bonus Level
Defeat 30 Red Caps
Unlock all of the members of Dumbledore's Army (Single Player Only)
Unlock every character with a pet (Single Player Only)
Unlock all witch characters (Single Player Only)
Unlock ALL of the Order of the Phoenix character variants (Single Player Only)
Unlock every bad wizard (Single Player Only)
Unlock every pyjama character variant (Single Player Only)
Complete "The Flaw in the Plan"
Complete Year 8
Complete "Snape's Tears"
Complete "Fiendfyre Frenzy"
Complete "Burning Bridges"
Complete "Back to School"
Complete "The Thief's Downfall"
Unlocked on hitting 50% game completion (Single Player Only)
Complete Year 7
Complete "DOBBY!"
Use a Quibbler dispenser 25 times
Complete "Lovegood's Lunacy"
Complete "Sword and Locket"
Complete "In Grave Danger"
Visit the Hogwarts Foyer in Year 7
Complete the scene where Hermione and Harry dance in the tent
Complete "Magic is Might"
Complete all lessons (Single Player Only)
Complete "The Seven Harrys"
Stand still with no controller input for 5 minutes
Use the Deluminator
Complete "Horcrux and the Hand"
Complete Year 6
Complete "Felix Felicis"
Complete "Love Hurts"
Complete "A Not So Merry Christmas"
Complete "Just Desserts"
Complete "Out of Retirement"
Collect 1 billion studs (Single Player Only)
Complete "A Veiled Threat"
Complete Year 5
Defeat Bellatrix as any Sirius Black character variant in a duel
Complete "A Giant Virtuoso"
Complete "Kreacher Discomforts"
Complete "Focus!"
Complete "Dumbledore's Army"
Complete "Dark Times"