Kill 20 enemies with explosives in a single level.

Survive a dog attack.

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

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

Save Pvt. Roycewicz on the stairs.

Collect 150 Cards

Survive a night in the Siberian wilderness

Enter the Syrian tomb

Kill the power.

Complete 'F.N.G.'.

The player has successfully hacked a safe

The player has successfully hacked a security camera

The player has performed at least one successful hack