Knock-knock
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
1/12/2010
3:35:24 PM
Rare 15.2%
Colonel Sanderson
Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.
1/12/2010
2:27:55 PM
Very Rare 6.8%
It Goes to Eleven
Earn at least 1 star in 11 different Special Op missions.
12/31/2009
1:24:31 AM
Rare 17.0%
Desperado
Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops.
12/31/2009
1:16:06 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.
12/29/2009
7:41:37 PM
Rare 25.3%