Take back Whiskey Hotel.

Storm the gulag.

Kill 6 enemies in a row using a thermal weapon 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.

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

Help train the local militia.

You killed 5 opposing team members.

You killed a Rockstar in multiplayer.

You have completed the story.

You completed the mission "I'll Take Her".

You completed the mission "Museum Piece".

You unlocked the special ability of buying guns from Little Jacob.

You completed the mission "Uncle Vlad".