Perform 15 successful disarms (outside of the tutorial)

Complete a chapter without getting shot

Finish 5 Wager Matches "in the money."

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

Earn at least 1 star in each Special Op mission.

Build up a certain level of trust with your partner.

Obtain all treasures in the game.

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

Defeat 3 Majini at once by setting oil canisters on fire.

Defeat 3 Majini with one grenade or proximity bomb.

Defeat 30 enemies with the Gatling gun.

Defeat 30 enemies with the Longbow.