Earn 4 stars in Special Ops.

Unlocked: 03 Sep 2011 17:28:25

Earn 1 star in Special Ops.

Unlocked: 03 Jul 2011 10:51:04

Complete the Single Player campaign on any difficulty.

Unlocked: 01 Jul 2011 19:49:35

Complete the mission in the airplane graveyard.

Unlocked: 01 Jul 2011 19:14:10

Assault Makarov's safe house.

Unlocked: 01 Jul 2011 18:36:06

Take back Whiskey Hotel.

Unlocked: 01 Jul 2011 18:03:08

Execute the plan to help the Americans.

Unlocked: 30 Jun 2011 21:14:58

Storm the gulag.

Unlocked: 30 Jun 2011 20:32:46

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

Unlocked: 30 Jun 2011 20:08:23

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

Unlocked: 30 Jun 2011 19:28:17

Defend Burger Town.

Unlocked: 29 Jun 2011 23:59:48

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

Unlocked: 29 Jun 2011 23:48:53

Find Rojas in the Favelas.

Unlocked: 29 Jun 2011 23:25:44

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

Unlocked: 29 Jun 2011 22:44:55

Infiltrate the snowy mountain side base.

Unlocked: 29 Jun 2011 22:15:38

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

Unlocked: 29 Jun 2011 22:04:48

Get hand picked for Shepherd's elite squad.

Unlocked: 29 Jun 2011 21:55:15

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

Unlocked: 29 Jun 2011 21:43:21

Help train the local militia.

Unlocked: 29 Jun 2011 21:40:37

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 8 stars in Special Ops.

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 4 enemies in a row while downed 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.