Complete the Single Player campaign on any difficulty.
Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
Complete the mission in the airplane graveyard.
Assault Makarov's safe house.
Take back Whiskey Hotel.
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
Earn at least 1 star in each Special Op mission.
Earn all 3 stars in at least 10 different Special Op missions.
Execute the plan to help the Americans.
Storm the gulag.
Use a riot shield to beat down an enemy in Single Player or Special Ops.
Defend Burger Town.
Find Rojas in the Favelas.
Earn all 3 stars in at least 5 different Special Op missions.
Earn 30 stars in Special Ops.
Kill a Juggernaut in Special Ops.
Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
Earn at least 1 star in 11 different Special Op missions.
Earn 21 stars in Special Ops.
Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.
Earn 8 stars in Special Ops.
Earn 4 stars in Special Ops.
Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.
Earn 1 star in Special Ops.
Infiltrate the snowy mountain side base.
Get hand picked for Shepherd's elite squad.
Kill 2 enemies with a single bullet in Single Player or Special Ops.
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
Help train the local militia.
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.
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.
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'.
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