Call of Duty 4: Modern Warfare
Cheats can be unlocked by collecting enemy intel on laptop computers.
However, if you use cheats, it will disable Achievements.
CoD Noir: Simply turns all gameplay turns black and white, giving the game a classic war movie feel. Collect 2 pieces of enemy intel.
Super Contrast: Dramatically increases the game’s contrast, making the darks much darker and the lights much lighter. Collect 6 pieces of enemy intel. Photo-Negative: Inverses all of the colors of the game. Collect 4 pieces of enemy intel.
Cluster Bombs: After one of your frag grenades explodes, four more explode in a cross-shape pattern. Collect 10 pieces of enemy intel.
Ragtime Warfare: Gameplay goes black-and-white, dust and scratches fill the screen, it plays at 2x speed, and the music becomes piano music. Collect 8 pieces of enemy intel.
A Bad Year: When you kill enemies, they explode into a bunch of old tires! Collect 15 pieces of enemy intel.
Infinite Ammo: Wepaons have unlimited ammo, you don’t even need to reload! Doesn’t work with single-shot weapons like C4 and Claymores. Collect 30 pieces of enemy intel.
Slow-Mo Ability: By using the melee button, you can change the game to slow-mo and play at half-speed. Collect 20 pieces of enemy intel.