Sharpshooter
Get 30 headshots while scoped in with the Fareye or Marksman in the single player Campaign.
9/1/2010
10:57:15 PM
Rare 31.1%
Desperado
Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops.
6/24/2010
8:49:10 PM
Rare 21.2%
Knock-knock
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
6/24/2010
8:24:44 PM
Rare 15.2%
Unnecessary Roughness
Use a riot shield to beat down an enemy in Single Player or Special Ops.
6/22/2010
7:08:08 AM
Rare 34.5%
Defensive Fighter - Kill 30 Helghast with an emplaced weapon
Kill 30 Helghast using the StA3 fixed gun emplacement
6/6/2010
7:33:23 PM
Rare 45.1%