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