Complete 'Hunted' and 'Death From Above' on Veteran difficulty.

Kill 5 enemies with one shot while in the AC-130 gunship.

Survive a dog attack.

Protect 'War Pig', the Abrams tank.

Save Pvt. Roycewicz on the stairs.

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

Kill the power.

Infiltrate a cargo ship.

Equip glasses on one of your units.

Killed 2 enemies simultaneously.

Used Grit to avoid an enemy attack.

Finished off an enemy with an Assist.