Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Let's Finish This (10 points)	You revealed the end is the beginning when you completed Prequel: Day 56.
The Pwnage (30 points)	Definitely not a noob, you can hang with the boys from Pure Pwnage and pwn 10,000 zombies!
Warm It Up (10 points)	Not bad... you survived Pure Pwnage for 10 minutes. Tell your friends.