Supreme Survivors
In Survivors mode, have all 4 players on your team Survive the game.
9/4/2012
1:05:54 AM
Ultra Rare 3.5%
Raccoon City Cleanser
Complete all U.S.S. missions on Professional.
8/30/2012
2:09:47 AM
Ultra Rare 4.0%
Danger, High Voltage!
Complete the third mission of the U.S.S. campaign.
8/29/2012
12:21:39 AM
Rare 47.8%
Bloody Good Time
Kill 5 enemies with Blood Frenzy in a single campaign game or multiplayer match.
8/26/2012
4:02:03 AM
Common 51.5%
Chaos Averted
Kill an infected teammate with a headshot before they become a zombie in any mode.
8/26/2012
3:39:51 AM
Rare 26.7%
