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

Achievement	How to unlock
Big Finish ( 5 points )	Complete the first tier of the challenge "Big Finish" in any mode.
Couch Potato ( 10 points )	Complete the first tier of the challenge "Couch Potato".
EX-ceptional ( 20 points )	Complete the third tier of the challenge "EX-ceptional" in any mode.
Going Streaking ( 20 points )	Complete the second tier of the challenge "Going Streaking" in ranked online mode.
Mystery Man ( 20 points )	Complete the challenge "Mystery Man".
Pocket Full Of Quarters ( 30 points )	Complete the challenge "Pocket Full Of Quarters".
Practice Makes Perfect ( 20 points )	Complete the challenge "Practice Makes Perfect".
Sharing Is Caring ( 10 points )	Complete the challenge "Sharing Is Caring".
Sticks & Stones ( 20 points )	Complete the first tier of the challenge "Sticks & Stones" in any mode.
Super Artist ( 20 points )	Complete the third tier of the challenge "Super Artist" in any mode.
The Bitter End ( 5 points )	Complete the challenge "The Bitter End".
Wax On, Wax Off ( 20 points )	Complete the third tier of the challenge "Wax On, Wax Off" in any mode.