Kill the Pentagon thief before it can steal your load-out.

Shoot at or be shot by an ally with a Pack-a-Punch crossbow and kill six zombies with the explosion.

Demonstrate killer economic sensibilities by taking down 3 enemies with a single bullet.

Find all the hidden intel.

Watch a film or clip with a friend.

Destroy both helicopters with one Valkyrie rocket from the deck of the ship.

Incinerate 10 enemies with the flamethrower attachment in the POW compound.

Enter the Soviet relay station undetected.

Use only dual wield weapons to escape Kowloon.

Use the Grim Reaper to destroy the MG emplacement.

Play Zork on the terminal.

Use no more than 6 TOW guided missiles to destroy the tanks in the defense of Khe Sanh.