Hide in a barrel as Snape

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

Collect 10 million studs in one level

Unlock all Animagi

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

Knock over ten characters using a ride-able object

Rescue all students in peril

Kaitlyn survived the night alone

Ryan survived alone

Never missed in a combat encounter

Jacob told Emma the truth

Collected all evidence