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

Achievement	How to unlock
Born Winner ( 20 points )	Complete all single player Supremacy challenges.
Cleaning Up ( 20 points )	Collect 5 score patches in one wave in Tackle Alley.
Headbanger ( 10 points )	Collide 2 defenders into each other.
It Begins ( 10 points )	Complete a wave.
Jack of all Trades ( 20 points )	In Tackle Alley use jump, barge and slide on all of the appropriate tacklers in a wave.
Multiply and Conquer ( 10 points )	Reach 10 combo multiplier in Tackle Alley.
Parting Waves ( 20 points )	Complete all single player Tackle Alley challenges.
Pole Position ( 20 points )	Score highest on every wave of a single player Supremacy challenge.
Relentless ( 20 points )	Complete an entire single player Vengeance challenge without giving up a score.
Tackle Master ( 20 points )	Complete all single player Vengeance challenges.
The Immortal ( 20 points )	Complete a single player Tackle Alley challenge without losing a life.
The Jester ( 10 points )	Showboat down the field for 30 yards in one wave in Tackle Alley.