Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.

Unlocked: 23 Dec 2012 18:15:39

Knife an enemy without him ever knowing you were there in Single Player or Special Ops.

Unlocked: 02 Dec 2012 10:06:27

Infiltrate the snowy mountain side base.

Unlocked: 15 Sep 2012 14:40:55

Kill 4 enemies in a row while downed in Special Ops.

Unlocked: 03 Sep 2012 09:11:25

Use a riot shield to beat down an enemy in Single Player or Special Ops.

Unlocked: 03 Sep 2012 08:56:48

Earn 8 stars in Special Ops.

Unlocked: 10 Dec 2011 14:49:56

Get hand picked for Shepherd's elite squad.

Unlocked: 02 Nov 2011 18:39:05

Kill 2 enemies with a single bullet in Single Player or Special Ops.

Unlocked: 02 Nov 2011 18:34:12

Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.

Unlocked: 02 Nov 2011 18:26:02

Help train the local militia.

Unlocked: 02 Nov 2011 18:24:54

Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.

Unlocked: 01 Nov 2011 21:03:41

Earn 4 stars in Special Ops.

Unlocked: 01 Nov 2011 20:37:25

Earn 1 star in Special Ops.

Unlocked: 31 Oct 2011 18:21:49

Find Rojas in the Favelas.

Defend Burger Town.

Storm the gulag.

Execute the plan to help the Americans.

Take back Whiskey Hotel.

Assault Makarov's safe house.

Complete the mission in the airplane graveyard.

Complete the Single Player campaign on any difficulty.

Complete the single player campaign on Hardened or Veteran Difficulty.

Complete 'S.S.D.D' and 'Team Player' on Veteran Difficulty.

Complete 'Cliffhanger' on Veteran Difficulty.

Complete 'Takedown' and 'The Hornet's Nest' on Veteran Difficulty.

Complete 'Wolverines!' and 'Exodus' on Veteran Difficulty.

Complete 'The Only Easy Day... Was Yesterday' and 'The Gulag' on Veteran Difficulty.

Complete 'Contingency' on Veteran Difficulty

Complete 'Of Their Own Accord', 'Second Sun', and 'Whiskey Hotel' on Veteran Difficulty.

Complete 'Loose Ends' and 'The Enemy of My Enemy' on Veteran Difficulty.

Complete 'Just Like Old Times' and 'Endgame' on Veteran Difficulty.

Run The Pit in 'S.S.D.D' and finish with a final time under 30 seconds.

Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.

Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.

Earn at least 1 star in 11 different Special Op missions.

Earn all 3 stars in at least 5 different Special Op missions.

Earn 21 stars in Special Ops.

Earn at least 1 star in each Special Op mission.

Earn all 3 stars in at least 10 different Special Op missions.

Earn 30 stars in Special Ops.

Earn all 3 stars in at least 15 different Special Op missions.

Earn 69 stars in Special Ops.

Kill a Juggernaut in Special Ops.

Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.

Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.

Collect 22 enemy intel items.

Collect 45 enemy intel items.

Kill 20 enemies in a row while driving a vehicle in Single Player or Special Ops.

Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops.

Kill 10 enemies in a row using akimbo weapons in Single Player or Special Ops.