Perkaholics Anonymous!
Survive until round 20 without buying a single Perk. (Map Pack 3 only)
9/24/2009
10:00:39 PM
Ultra Rare 4.7%
Pack Addict!
Upgrade 5 weapons at the Pack A Punch Machine. (Map Pack 3 only)
9/14/2009
2:34:40 PM
Very Rare 5.4%
Acquire Waffle Weapons!
Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)
8/15/2009
1:22:00 PM
Very Rare 5.6%
Der Electrician!
Link all teleport pads before round 7. (Map Pack 3 only)
8/14/2009
5:40:48 AM
Very Rare 7.6%
It's a Trap!
Kill at least one zombie with three different traps in a single round. (Map Pack 2 only)
7/21/2009
5:30:10 PM
Ultra Rare 2.7%
