Some Like it Hot
Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
11/20/2010
2:20:13 PM
Rare 39.8%
The Harder They Fall
Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.
7/9/2010
10:17:27 AM
Rare 30.0%
Operation Ghost Rider
Finish the 1st mission of the Campaign on Normal, Hard, or Elite difficulty setting.
1/22/2010
10:07:12 AM
Common 81.0%
The Basics
Complete one of the missions you receive in the mission log.
1/17/2010
6:05:22 PM
Common 89.1%
No Rest For the Wary
Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
12/29/2009
1:06:43 AM
Rare 25.3%
Three-some
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
12/24/2009
9:28:39 PM
Common 54.5%