Defeat Pollux

Complete "Dark Times"

Hide in a barrel as Snape

Destroy 50 Devil's Snare plants

Defeat Harry (as Voldemort), in the Graveyard

Defeat the mountain troll, using Quirrell

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

Collect all of the Gold Bricks

Buy the entire Weasley family

Scare 20 students using a ghost character

Complete all the LEGO Builder tutorial levels.

Collect all of the house crests in Year 4

Collect all of the house crests in Year 2