Kill 4 enemies in a row with headshots in the single player campaign.

Kill 2 enemies by blowing up a car in the single player campaign.

Kill at least 3 rappelling enemies in a single rope.

Survive a dog attack.

Operate an AC-130 gun ship.

Protect 'War Pig', the Abrams tank.

Kill an enemy while blinded by a flashbang in the single player campaign.

Infiltrate a cargo ship.

Create a MUT Team.

Eliminate 5 opponents with shotguns.

Eliminate 5 opponents with DMRs.

Join or create a group.