Complete 50% of the tips in the Practice Arena.

Win a match in which you successfully pin an opponent (Offline).

Crack the code.

Enter the Soviet relay station undetected.

Destroy all targets and structures while making your way up the river.

Silently take out 3 VC.

Reach rank 10 in Combat Training.

Escape Kowloon.

Retrieve the dossier and the defector from Hue City.

Kill 10 NVA with Dragon's Breath rounds.

Use no more than 6 TOW guided missiles to destroy the tanks in the defense of Khe Sanh.

In Dead Ops Arcade, use a Speed Boost to blast through 20 or more enemies at one time.

Receive orders from Lancer.