Complete Chapter 3 in Chris' campaign.

Purchase one skill.

Drive a total distance of 10 kilometers.

Kill 50 zombies using a vehicle.

Create a customized weapon.

Defeat 30 enemies with the Tau Sniper

Reach Sergeant (Level 10) in multiplayer Public Match.

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

Complete the tutorial.

Finish the game in Normal Mode

Defeat 30 enemies with the M9

Find 20 treasures

Play in the swimming pool on the Cruise Ship