Knock-knock
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
9/2/2010
3:28:04 PM
Rare 15.2%
Dr Frankenstein
Create a living creature with at least 2 eyes, 2 legs or wheels, and a brain
8/31/2010
4:12:02 PM
Rare 15.3%
Socialite
Complete a level online with 3 other players who are not on your friends list
8/28/2010
10:17:29 PM
Rare 18.0%
Trendsetter
Place a sticker or a decoration on another player's sackperson
8/28/2010
6:26:58 PM
Rare 37.6%
Fashion Sense
Choose a costume for your sackperson with at least one item on your head, at least one item on your body, and a material
8/28/2010
6:05:26 PM
Common 86.3%
