Two Birds with One Stone
Kill 2 enemies with a single bullet in Single Player or Special Ops.
8/2/2010
7:32:15 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.
8/2/2010
7:27:33 PM
Common 54.5%
Total Fist Bump Deflation
Finish the game in a fractured friendship
7/27/2010
3:41:35 PM
Ultra Rare 2.9%
Not So Bad After All
Tie up 15 enemy combatants instead of executing them
7/16/2010
2:05:39 PM
Rare 16.6%
Old Faithful
Kill 400 enemies with assault rifles, submachine guns or shotguns
7/14/2010
11:00:10 PM
Rare 43.1%