Get Your Hands Dirty
Complete 'Semper Fi' on Veteran difficulty. (Solo only)
6/3/2010
10:33:09 PM
Very Rare 7.5%
No Rest For the Wary
Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
3/15/2010
8:06:36 PM
Rare 25.3%
Knock-knock
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
3/12/2010
4:42:22 AM
Rare 15.2%
Operative
Earn all 3 stars in at least 10 different Special Op missions.
3/12/2010
2:29:34 AM
Very Rare 5.6%
Colonel Sanderson
Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.
3/11/2010
12:47:52 AM
Very Rare 6.8%
Operational Asset
Earn all 3 stars in at least 5 different Special Op missions.
3/7/2010
8:29:03 PM
Very Rare 9.7%
It Goes to Eleven
Earn at least 1 star in 11 different Special Op missions.
3/7/2010
8:28:56 PM
Rare 17.0%
The Harder They Fall
Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.
3/7/2010
8:08:33 PM
Rare 30.0%
Off the Grid
Complete 'Just Like Old Times' and 'Endgame' on Veteran Difficulty.
12/31/2009
3:00:20 AM
Ultra Rare 3.7%
The Price of War
Complete the single player campaign on Hardened or Veteran Difficulty.
12/31/2009
3:00:10 AM
Very Rare 5.8%