You Win
Win a match in Arcade Mode without losing a round (any difficulty level)
6/25/2012
3:10:58 AM
Common 77.4%
A Gun by Any Other Name
Kill an enemy with each weapon type including special weapons.
5/1/2012
2:23:23 PM
Rare 24.8%
Chaos Averted
Kill an infected teammate with a headshot before they become a zombie in any mode.
5/1/2012
1:40:56 PM
Rare 26.7%
Danger, High Voltage!
Complete the third mission of the U.S.S. campaign.
4/28/2012
2:17:32 PM
Rare 47.8%
Bloody Good Time
Kill 5 enemies with Blood Frenzy in a single campaign game or multiplayer match.
4/28/2012
2:06:03 PM
Common 51.5%
