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