Knock-knock
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
7/9/2010
12:14:05 PM
Rare 15.2%
Desperado
Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops.
7/9/2010
5:37:40 AM
Rare 21.2%
No Rest For the Wary
Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
7/7/2010
8:45:19 AM
Rare 25.3%
The Harder They Fall
Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.
7/7/2010
8:30:04 AM
Rare 30.0%
Ten plus foot-mobiles
Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.
7/7/2010
6:13:56 AM
Rare 45.1%
Three-some
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
7/7/2010
6:05:22 AM
Common 54.5%
Some Like it Hot
Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
7/7/2010
6:05:15 AM
Rare 39.8%
Look Ma Two Hands
Kill 10 enemies in a row using akimbo weapons in Single Player or Special Ops.
7/7/2010
5:55:22 AM
Rare 12.6%
Unnecessary Roughness
Use a riot shield to beat down an enemy in Single Player or Special Ops.
7/7/2010
5:41:05 AM
Rare 34.5%
Two Birds with One Stone
Kill 2 enemies with a single bullet in Single Player or Special Ops.
7/7/2010
5:09:51 AM
Common 57.6%
40 Knives!
Kill 40 zombies with the bowie knife. (Map Pack 3 only)
1/12/2010
10:28:59 PM
Ultra Rare 2.9%
Blue Ribbon
Complete a 4-player Competitive Co-Op match in 1st place. (Online co-op Only)
1/10/2010
9:20:18 PM
Very Rare 5.2%
For the Resistance
Complete Chapter 9 - For the Resistance on any difficulty
8/18/2009
6:51:19 AM
Rare 46.5%
Every life is sacred
Complete Chapter 8 - Every life is sacred on any difficulty
8/18/2009
6:43:50 AM
Rare 47.0%