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

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

Destroy all slingshot targets in 3 attempts.

Play Zork on the terminal.

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

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

Complete the campaign on any difficulty.

Enter the Soviet relay station undetected.

Escape the Past.

Retrieve the dossier and the defector from Hue City.

Kill 10 NVA with Dragon's Breath rounds.

Sabotage the Soviet space program.

Escape Vorkuta.