Collect 22 enemy intel items.
Collect 45 enemy intel items.
Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.
Kill 4 enemies in a row while downed in Special Ops.
Complete the single player campaign on Hardened or Veteran Difficulty.
Complete 'Cliffhanger' on Veteran Difficulty.
Complete 'Takedown' and 'The Hornet's Nest' on Veteran Difficulty.
Complete 'The Only Easy Day... Was Yesterday' and 'The Gulag' 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.
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.
Earn all 3 stars in at least 15 different Special Op missions.
Earn at least 1 star in 11 different Special Op missions.
Earn all 3 stars in at least 10 different Special Op missions.
Earn 30 stars in Special Ops.
Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
Earn 4 stars in Special Ops.
Earn 8 stars in Special Ops.
Earn all 3 stars in at least 5 different Special Op missions.
Earn 21 stars in Special Ops.
Kill a Juggernaut in Special Ops.
Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.
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 'S.S.D.D' and 'Team Player' on Veteran Difficulty.
Complete 'Wolverines!' and 'Exodus' on Veteran Difficulty.
Complete 'Contingency' on Veteran Difficulty
Use a riot shield to beat down an enemy in Single Player or Special Ops.
Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
Storm the gulag.
Execute the plan to help the Americans.
Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.
Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.
Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
Find Rojas in the Favelas.
Defend Burger Town.
Earn 1 star in Special Ops.
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.
Get hand picked for Shepherd's elite squad.
Infiltrate the snowy mountain side base.
Earn at least 1 star in each Special Op mission.
Earn 69 stars in Special Ops.
Run The Pit in 'S.S.D.D' and finish with a final time under 30 seconds.
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