Call of Duty 4 features:
You can hack cheat mode by completing the game, a cheat option will then appear during your gameplay under the options. Then collect Intel. Here is a list of pieces amount you need to collect: A Bad Year - 15 Intel Pieces. Enemies explode into tires when shot. Cluster Bombs - 10 Intel Pieces. When a frag grenade explodes, four more will explode in a cross-shaped pattern. CoD Noir - 2 Intel Pieces. Allows black and white graphics. Infinite Ammo - 30 Intel Pieces. Reloads are no longer necessary. This has no effect with single-shot weapons such as RPGs, C4, or Claymores. Photo-Negative - 4 Intel Pieces. Inverts the colors. Ragtime Warfare - 8 Intel Pieces. Gets you into silent mode. Slow-Mo Ability - 20 Intel Pieces. The game (at melee) decreases game speed twice. Super Contrast - 6 Intel Pieces. This one gets the contrast increased.
Enjoy this cheat. Provided by Digger