Lendo o consagrado site Gamespot, achei os códigos cheats do Call of Duty 4: Modern Warfare, da Activision e Infinity Ward. O game está fazendo grande sucesso principalmente entre os usuários de PC e Xbox 360. Portanto, resolvi compartilhar com os leitores do Saiba Tudo os referidos código.

give all - Access All Weapons
god  - God Mode
noclip - No Clipping Mode
notarget - Enemies Ignore You
give ammo - Full Ammo
jump_height # - Adjust Gravity Default = 39
timescale #  - Adjust Time Default = 1.00
cg_LaserForceOn 1 - Add Laser Sights to ALL Weapons
demigod - God mode but screen still shakes
ufo - Same as noclip?
r_fullbright - Easier to see things
cg_draw - Gun Removes Your Gun
cg_fov - Zoom with any Gun
player_sprintSpeedScale - Set player’s sprint speed