Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
20/20 (40 points)	Upgrade 2 weapons to level 20.
Burgle Burgle Burgle (15 points)	Steal 10 kills from a teammate.
Cheapskate (15 points)	Acquire the Exo suit without spending any money.
Come On And ... (25 points)	Slam 10 zombies at once.
Do You Even Exo? (15 points)	Exo Melee kill 10 zombies in 30 seconds.
Game Over, Man! (50 points)	Call in a rescue.
I'm Alive! (10 points)	Survive until round 10.
Moneybags (25 points)	Have 15000 credits in the bank
PC Load Letter (30 points)	Use the 3D Printer 15 times in a single match.
Survivor (25 points)	Survive until round 25.