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