Codes

You need to enter these codes during a level, while playing, but they will only work once you have ulocked them.
Code                    Effect
Hold L, then: X, R, Triangle, R, Square, R	Bulletproof
Hold L, then: Square, Circle, X, R, R, Triangle	Draw Enemy Health
Hold L, then: X, O, X, R, Square, Triangle	Infinite Assualt Rifle Ammo
Hold L, then: R, Triangle, R, O, R, Square	Infinite Grenade Launcher
Hold L, then: R, O, Square, R, Square, X	Infinite Shotgun Ammo
Hold L, then: O, Triangle, R, R, X, O	Infinite SMG Ammo
Hold L, then: Triangle, X, Triangle, Square, R, O	One Shot Kill
Hold L, then: Triangle, X, O, R, Triangle, R	Wield Excalibur


Textureless Mode

Press and hold L,
Then press: R, X, O, X, Triangle, R


Unlockables
Tomb Trials Unlockables

Complete the following tasks in Tomb Trials mode to unlock special items.
Unlockable              How to Unlock
Biker, Brown Jacket Outfit	Complete Bolivia on the Medium setting in Treasure Hunt mode
Legend, Camo Shorts     Beat Bolivia on the Hard setting in Treasure Hunter Mode
Silver Gallery          Complete Bolivia, Croft Manor and Fiery Maze on the Easy setting in Treasure Hunt mode