Young Competitor
Earn a gold medal in any challenge on Novice difficulty.
11/16/2010
8:06:57 PM
Common 59.4%
Pack Addict!
Upgrade 5 weapons at the Pack A Punch Machine. (Map Pack 3 only)
11/16/2010
12:55:35 PM
Very Rare 5.4%
Perkaholics Anonymous!
Survive until round 20 without buying a single Perk. (Map Pack 3 only)
11/15/2010
9:43:18 PM
Ultra Rare 4.7%
Der Electrician!
Link all teleport pads before round 7. (Map Pack 3 only)
11/15/2010
3:51:50 PM
Very Rare 7.6%
The Cleaner
Destroy 10 Military Bases or Infected Hives in New York City.
9/2/2010
3:22:59 PM
Rare 39.4%
Desperado
Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops.
8/17/2010
5:40:24 PM
Rare 21.2%
