Successfully complete Campaign mode. Pause game play in Campaign mode, then select "Options" to access the "Cheat" menu. To unlock the cheat options, find the indicated number of hidden Intel pieces. Note: Cheats must be reactivated after losing a life.

A Bad Year: 15 Intel.
Cluster Bombs: 10 Intel.
CoD Noir: 2 Intel.
Infinite Ammo: 30 Intel.
Paintball: 8 Intel.
Photo-Negative: 4 Intel.
Slow-Mo Ability: 20 Intel.
Super Contrast: 6 Intel.