In-Game Cheats
To unlock the following, you must beat the respective tour of duty (US, Canada and Britan).
Effect - Code
Unlimited Ammo - Beat the game on the Green Difficulty
Unlimited Grenades - Beat the game on the Veteran Diffculty
Unlimited Health - Beat the game on the Hardened Difficulty
Level select
At the start menu, press X, Triangle, Up, Left, Square to unlock all levels.