Collect all the bronze, silver and gold trophies
Defeat Harry (as Voldemort), in the Graveyard
Defeat 10 enemies with a Muggle character
Complete the Quidditch level within five minutes
Defeat Quirrell in the Quirrell boss fight, using Voldemort
Complete the game to 100%
Unlock all Animagi
Buy every version of Voldemort (Quirrell/Tom Riddle/Voldemort)
Collect all of the Gold Bricks
Collect all of the house crests in Year 4
Rescue all students in peril
Collect all of the house crests in Year 3
Get True Wizard in every level
Buy the entire Weasley family
Collect all of the house crests in Year 2
Hide in a barrel as Snape
Destroy 50 Devil's Snare plants
Complete all the LEGO Builder tutorial levels.
Buy the entire Gryffindor Quidditch team from Book One
Collect all of the Red Bricks
Collect all of the house crests in Year 1
Collect 10 million studs in one level
Scare 20 students using a ghost character
Defeat 20 enemies with Fang
Turn the sound and music down to 0 in the options menu whilst in the library
Defeat the mountain troll, using Quirrell
Freeze 20 characters using Glacius
Complete the Story Levels in all four years
Complete Year Four Story Levels
Complete All Story Lessons
Use the Time-Turner
Complete Year Three Story Levels
Complete Year Two Story Levels
Defeat 20 spiders with Ron
Collect 500 ghost studs
Knock over ten characters using a ride-able object
Complete Year One Story Levels