Complete the game under the indicated difficulty setting to unlock the corresponding cheat option.

Unlockable	How to unlock
All Weapons	Complete all four Greece Time Trial levels.
Golden Shotgun	Complete all three Lost Island Time Trial levels.
Infinite 50 Caliber pistol ammo	Complete all four Peru Time Trial levels.
Infinite Breath	Easy difficulty
Infinite Health	Complete all three Egyptian Time Trial levels.
Infinite Mini SMG Ammo	Complete all three Egyptian Time Trial levels.
Infinite Shotgun Ammo	Complete all four Greece Time Trial levels.
Show Enemy Health	Complete all four Peru Time Trial levels.
Silver Mini SMGs	Complete all three Lost Island Time Trial levels.
Sunglasses	Easy difficulty.
Textureless Mode	Easy difficulty.