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

Use the explosive bolts to kill 30 enemies in the campaign.

Complete "Operation 40," "Vorkuta," and "Executive Order" on Veteran difficulty.

Complete "SOG" and "The Defector" on Veteran difficulty.

Complete "Numbers," "Project Nova," and "Victor Charlie" on Veteran difficulty.

Complete "Crash Site," "WMD," and "Payback" on Veteran difficulty.

Complete "Rebirth" and "Redemption" on Veteran difficulty.

Find all the hidden intel.

Reach rank 10 in Combat Training.

Buy every weapon off the walls in a single Zombies game.

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.

Access the terminal and battle the forces of the Cosmic Silverback in Dead Ops Arcade.

In Dead Ops Arcade, use a Speed Boost to blast through 20 or more enemies at one time.

Break free from the torture chair.

Play Zork on the terminal.