Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
4/27/2011
2:06:36 AM
Rare 31.6%
Team Building
Complete all test chambers in the Team Building co-op course
4/26/2011
3:11:10 AM
Rare 46.8%
Bridge Over Troubling Water
Complete the first Hard-Light Surfaces test
4/24/2011
5:50:35 PM
Common 62.8%
Three-some
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
4/23/2011
8:43:57 PM
Common 54.5%
No Rest For the Wary
Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
4/23/2011
8:25:17 PM
Rare 25.3%
Two Birds with One Stone
Kill 2 enemies with a single bullet in Single Player or Special Ops.
4/23/2011
8:13:44 PM
Common 57.6%