Unnecessary Roughness
Use a riot shield to beat down an enemy in Single Player or Special Ops.
12/4/2009
9:54:13 PM
Rare 34.5%
Some Like it Hot
Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
12/4/2009
9:43:30 PM
Rare 39.8%
Ten plus foot-mobiles
Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.
12/1/2009
4:11:33 PM
Rare 45.1%
Two Birds with One Stone
Kill 2 enemies with a single bullet in Single Player or Special Ops.
11/29/2009
4:19:25 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.
11/29/2009
4:02:32 PM
Common 54.5%
Half-Truths
Complete a mission without causing a single Military Alert.
11/27/2009
8:53:02 PM
Rare 33.9%
Head to Head
Complete Chapter 12 on any difficulty setting (Story Mode).
11/27/2009
2:55:47 PM
Rare 17.6%
Shock Therapy
Complete Chapter 10 on any difficulty setting (Story Mode).
11/27/2009
1:53:37 PM
Rare 20.2%