Run-and-Gunner
Defeat 20 enemies by shooting from the hip (without aiming with the L button).
4/27/2012
4:58:16 PM
Rare 10.7%
Sharpshooter
Get 30 headshots while scoped in with the Fareye or Marksman in the single player Campaign.
11/28/2011
12:47:45 PM
Rare 31.1%
Exotic Weapon Collector
Get 20 kills with each weapon in the game in the single player Campaign.
11/10/2011
5:51:32 PM
Very Rare 6.9%
The Bigger They Are
Defeat the Leviathan in the single player Campaign.
11/10/2011
4:04:38 PM
Rare 39.8%