Perkaholics Anonymous!
Survive until round 20 without buying a single Perk. (Map Pack 3 only)
8/10/2009
9:16:47 AM
Ultra Rare 4.7%
Pack Addict!
Upgrade 5 weapons at the Pack A Punch Machine. (Map Pack 3 only)
8/8/2009
7:09:44 AM
Very Rare 5.4%
Der Electrician!
Link all teleport pads before round 7. (Map Pack 3 only)
8/7/2009
4:12:55 AM
Very Rare 7.6%
Big Baller
Earn 75,000 points in a single Nazi Zombies game. (Map Pack 2 only)
8/1/2009
10:36:49 AM
Ultra Rare 3.0%
Perk-a-Holic
Have all four perks simultaneously active in a game of Nazi Zombies. (Map Pack 2 only)
7/25/2009
1:58:13 PM
Ultra Rare 4.2%
Weapon of Minor Destruction
Kill no more than one zombie with a nuke. (Map Pack 2 only)
6/30/2009
7:03:01 AM
Very Rare 7.0%
Shot in the Dark
Kill 10 enemies while the lights are out in the subway in 'Eviction'.
6/13/2009
6:46:28 AM
Rare 12.9%
R.I.P. Jordan Shepherd
Defeat Daedalus; complete the single player Campaign.
4/15/2009
10:43:56 AM
Rare 33.8%