Buy every version of Voldemort (Quirrell/Tom Riddle/Voldemort)

Collect all of the Gold Bricks

Collect all of the house crests in Year 4

Collect all of the house crests in Year 3

Defeat 20 spiders with Ron

Turn the sound down to 0 and music off in the options menu whilst in the library

Collect all of the Red Bricks

Complete Year Four Story Levels

Use the Time-Turner

Knock over ten characters using a ride-able object

Complete Year One Story Levels

Finish Shadows of Rose on Hardcore difficulty.