Complete the campaign on any difficulty.

Make it through the NOVA 6 gas without dying on Rebirth Island.

Escape the Past.

Retrieve the dossier and the defector from Hue City.

Break the siege in the battle of Khe Sanh.

Receive orders from Lancer.

Ensure your squad escapes safely from Cuba.

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

Campaign: find 15 collectable weapons

Campaign: finish Force Multiplier

Campaign: finish No One Gets Left Behind

Campaign: 10 melee kills

Campaign: 50 kills with sniper rifles