Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Battle-Hardened Gear ( 50 points )	Reach level 50 and play a match on each of the 4 Snowblind Map Pack maps (Public only)
Frigid Body Dynamics ( 5 points )	Play a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode)
Icy Dead People ( 25 points )	Complete waves 1 through 50 on any Snowblind Map Pack map in Horde (any difficulty)
Never Eat Red Snow ( 20 points )	Complete waves 1 through 10 on all Snowblind Map Pack maps in Horde (any difficulty)
The Weather Outside Is Lethal ( 15 points )	Win a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode)
Veteran Gear ( 75 points )	Reach level 100 and win a match on each of the 4 Snowblind Map Pack maps (Public only)