Hard Finish
Finish story mode on Hard, without changing the difficulty setting.
11/28/2009
11:09:52 PM
Very Rare 6.6%
Some Like it Hot
Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
11/28/2009
7:41:04 AM
Rare 39.8%
Ten plus foot-mobiles
Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.
11/21/2009
1:04:40 AM
Rare 45.1%
Ghost
Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.
11/14/2009
10:45:18 PM
Ultra Rare 3.1%
No Rest For the Wary
Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
11/14/2009
9:39:13 PM
Rare 25.3%
Two Birds with One Stone
Kill 2 enemies with a single bullet in Single Player or Special Ops.
11/14/2009
9:29:29 PM
Common 57.6%
Three-some
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
11/14/2009
8:54:04 PM
Common 54.5%
