Kill a Juggernaut in Special Ops.

Unlocked: 17 Jan 2010 08:26:52

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

Unlocked: 17 Jan 2010 07:45:40

Collect 45 enemy intel items.

Unlocked: 17 Jan 2010 07:42:26

Complete the single player campaign on Hardened or Veteran Difficulty.

Unlocked: 17 Jan 2010 03:37:47

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

Unlocked: 17 Jan 2010 03:37:47

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

Unlocked: 17 Jan 2010 03:13:12

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

Unlocked: 17 Jan 2010 02:01:42

Complete 'Contingency' on Veteran Difficulty

Unlocked: 17 Jan 2010 01:31:34

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

Unlocked: 16 Jan 2010 22:27:54

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

Unlocked: 16 Jan 2010 21:15:21

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

Unlocked: 16 Jan 2010 19:48:45

Earn 8 stars in Special Ops.

Unlocked: 10 Jan 2010 22:52:45

Earn 4 stars in Special Ops.

Unlocked: 10 Jan 2010 22:36:43

Complete 'Cliffhanger' on Veteran Difficulty.

Unlocked: 10 Jan 2010 01:37:01

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

Unlocked: 10 Jan 2010 01:12:12

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

Unlocked: 10 Jan 2010 01:11:36

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

Unlocked: 05 Jan 2010 02:01:15

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

Unlocked: 05 Jan 2010 01:30:12

Help train the local militia.

Unlocked: Offline

Get hand picked for Shepherd's elite squad.

Unlocked: Offline

Infiltrate the snowy mountain side base.

Unlocked: Offline

Find Rojas in the Favelas.

Unlocked: Offline

Defend Burger Town.

Unlocked: Offline

Storm the gulag.

Unlocked: Offline

Execute the plan to help the Americans.

Unlocked: Offline

Take back Whiskey Hotel.

Unlocked: Offline

Assault Makarov's safe house.

Unlocked: Offline

Complete the mission in the airplane graveyard.

Unlocked: Offline

Complete the Single Player campaign on any difficulty.

Unlocked: Offline

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

Unlocked: Offline

Earn 1 star in Special Ops.

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

Earn 21 stars in Special Ops.

Unlocked: Offline

Earn 30 stars in Special Ops.

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

Collect 22 enemy intel items.

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

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

Unlocked: Offline

Earn at least 1 star in each Special Op mission.

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

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

Earn 69 stars in Special Ops.