Unlock Xbox Live Gamerscore points, by completing the following Achievements.

Achievement	How to unlock
A Good Offence ( 10 points )	Defeated 10 enemy wizards before they cast a spell.
A Good Start ( 10 points )	Defeated 100 enemy wizards, in the Main Story OR Challenges.
Accomplished Wizard ( 150 points )	Completed the game on Expert.
Back to You ... ( 10 points )	Defeated 10 enemy wizards with Protego deflections.
Blind Luck ( 5 points )	Defeated 10 enemy wizards from cover, without aiming.
Care of the Castle ( 20 points )	Escaped Voldemort with minimal damage to Hogwarts.
Complete Collection ( 50 points )	Collected 100% of all items.
Confringo! ( 10 points )	Defeated 100 enemy wizards with Confringo.
Covert Confidence ( 20 points )	Defeated 100 enemy wizards from cover.
Expelliarmus! ( 20 points )	Successfully dispelled 100 Protego shields with Expelliarmus.
Expulso! ( 10 points )	Defeated 100 enemy wizards with Expulso.
First Rung ( 10 points )	Completed your first challenge.
Full of Character ( 40 points )	Found all characters.
Getting There ... ( 20 points )	Defeated 500 enemy wizards in the Main Story OR Challenges.
Having a Blast ( 5 points )	Triggered 5 explosive reactions.
Hogwarts Defender ( 20 points )	Defeated 1000 enemy wizards in the Main Story OR Challenges.
Listen Up ( 40 points )	Found all Music Tracks.
Mastering Magic ( 80 points )	Completed the game on Advanced.
Not a Scratch ( 5 points )	Completed a level without being defeated.
Now You See Me ( 10 points )	Apparated over 100 metres.
Petrificus Totalus! ( 15 points )	Successfully paralysed 100 enemy wizards using Petrificus Totalus.
Protego! ( 20 points )	Used Protego against 100 spells.
Shining Example ( 50 points )	Completed all challenges at Gold standard.
Stopped in Their Tracks ( 10 points )	Defeated 5 enemy wizards with one Impedimenta cast.
Strategic Spell-casting ( 10 points )	Defeated 50 enemy wizards using more than one spell.
That Showed Them ... ( 10 points )	Defeated 4 enemy wizards with a Confringo cast.
The Best Defence ... ( 10 points )	Used Protego to defeat 20 enemy wizards at close range.
Up to the Challenge ( 30 points )	Completed all challenges.
Wizard-in-Training ( 40 points )	Completed the game on Normal.