Unlock the following cheats by entering the corresponding sequences of buttons during game play:
AA - triangle, up, triangle, right, triangle, down, triangle, left, triangle, up.
Enemies Will Not Target You - down(x3), L1, down(x3), R1, down(x2).
Invincibility - L1, up, R1, up, L1(x2), up, R1(x2), up.
Level Select - left(x4), L1, right(x4), R1.
No Clipping Mode - up(x3), L1, up(x3), R1, up(x2).
Refill Ammunition - triangle, circle, X, square, R1, triangle, square, X, circle, R1.
Restore Health - up(x2), down(x2), left, right, left, right, circle, X.
Wireframe Cycle - L1(x2), R1(x2), L1, R1, L1, R1, left, right.
Invincible gnom:
In the first chapter where Alex contacts her Dad, there is an invincible gnom under the table next to the locked door.
Hidden pumpkins:
Set the PS3 system date to Halloween October, 31. After being ambushed by Hunters and Combine drive down the road. Go up to the old truck by the supply cache. There will be lots of pumpkins sitting on the ground.
