Multiplier
10
Collect 10 million studs in one level (Single Player Only)
Watch Out!
15
Knock over ten characters using a ride-able object
Power Up!
45
Collect all of the Red Bricks (Single Player Only)
Junior
50
Complete Year One Story Levels
Dark Wizards
10
Buy every version of Voldemort (Quirrell/Tom Riddle/Voldemort) (Single Player Only)
Quidditch Team
10
Buy the entire Gryffindor Quidditch team from Book One (Single Player Only)
Back in Time
10
Use the Time-Turner
Building Blocks
30
Complete all the LEGO Builder tutorial levels (Single Player Only)
Good Dog
10
Defeat 20 enemies with Fang
Wonderful Weasleys
10
Buy the entire Weasley family (Single Player Only)
Quirrell Quandary
15
Defeat Quirrell in the Quirrell boss fight, using Voldemort
Arachnophobic
10
Defeat 20 spiders with Ron
Chilled out
10
Freeze 20 characters using Glacius
Boo!
10
Scare 20 students using a ghost character
Animagus
10
Unlock all Animagi (Single Player Only)
Defeating the Object
15
Defeat the mountain troll, using Quirrell
Solid Snape
15
Hide in a barrel as Snape
Role Reversal
15
Defeat Harry (as Voldemort), in the Graveyard
Senior
50
Complete Year Two Story Levels
Quiet Please!
15
Turn the sound and music down to 0 in the options menu whilst in the library
Lumos Solem
15
Destroy 50 Devil's Snare plants
Quick Quidditch
15
Complete the Quidditch level within five minutes
Ghostly Treasure
15
Collect 500 ghost studs
Prefect
50
Complete Year Three Story Levels
Head Boy
50
Complete Year Four Story Levels
Teacher's pet
70
Complete All Story Lessons (Single Player Only)
Story Complete!
70
Complete the Story Levels in all four years
Crest Collector
30
Collect all of the house crests in Year 1 (Single Player Only)
Crest Fanatic
30
Collect all of the house crests in Year 2 (Single Player Only)
Ultra Collector
30
Collect all of the house crests in Year 3 (Single Player Only)
The Ultimate Collector
30
Collect all of the house crests in Year 4 (Single Player Only)
The Bonus Level is Yours
70
Collect all of the Gold Bricks (Single Player Only)
Student Rescue
45
Rescue all students in peril (Single Player Only)
Stud Magnet
30
Get True Wizard in every level (Single Player Only)
You're the Best
70
Complete the game to 100% (Single Player Only)
Muggle Trouble
15
Defeat 10 enemies with a Muggle character