Collect all of the house crests in Year 1

Hide in a barrel as Snape

Scare 20 students using a ghost character

Complete Year Four Story Levels

Complete Year Three Story Levels

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

Defeat 20 enemies with Fang

Freeze 20 characters using Glacius

Collect 500 ghost studs

Complete level 'The Savior' and prevent the escalation of a new war

Complete level 'The Destroyer'

Complete level 'The Handler'

Find 50% of the collectibles in the campaign