Complete the following achievements to unlock Xbox Live Gamerscore points.

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

Note: Enabling cheats will not prevent achievements from becoming unlocked.