Knock-knock
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
3/3/2010
8:39:17 PM
Rare 15.2%
Desperado
Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops.
12/31/2009
7:51:10 PM
Rare 21.2%
Operative
Earn all 3 stars in at least 10 different Special Op missions.
12/29/2009
10:55:06 PM
Very Rare 5.6%
The Harder They Fall
Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.
12/21/2009
10:28:45 PM
Rare 30.0%
Out of the Frying Pan...
Complete the mission in the airplane graveyard.
12/21/2009
10:20:30 PM
Rare 33.0%