Own 1 house (caravan)

Break the siege in the battle of Khe Sanh.

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

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

Sabotage the Soviet space program.

Escape Vorkuta.

Take down Castro with a headshot.

Revive another player in Co-op mode

Save 10 survivors

Create a combo weapon

Complete the 3 missions for the South Central time trial.

Have $1 million dollars in the bank while playing in Los Angeles.