Cheat mode:
     Codes are unlocked by performing certain tasks during the game. A
message  with the code will appear to confirm successful completion of
the  task.  Codes  cannot  be enabled until they are first unlocked in
this manner.

No textures:
     Hold L1 and press L2, X, Circle, X, Triangle, R1 during game play.

Draw enemy health:
     Hold L1 and press Square, Circle, X, L2, R1, Triangle during game
play.

Unlimited assault rifle ammunition:
     Hold L2 and press X, Circle, X, L1, Square, Triangle during game 
play.

Unlimited grenades:
     Hold  L2  and  press  L1, Triangle, R1, Circle, L1, Square during
game play.

Unlimited shotgun ammunition:
     Hold L2 and press R1, Circle, Square, L1, Square, X during game 
play.

Unlimited SMG ammunition:
     Hold L2 and press Circle, Triangle, L1, R1, X, Circle during game
play.

Bulletproof Lara:
     Hold L1 and press X, R1, Triangle, R1, Square, L2 during game play.

One shot kill:
     Hold  L1  and  press  Triangle,  X,  Triangle, Square, L2, Circle
during game play.

Wield Excalibur:
     Hold  L2  and  press Triangle, X, Circle, R1, Triangle, L1 during
game play.

Wield Soul Reaver:
     Hold L2 and press X, R1, Circle, R1, L1, Square during game play.