Show all maps:
At the Main or Pause menu, hold L1 and press: X, Circle, Square, Triangle, Triangle, Circle, X.

Show the ending:
At the Main or Pause menu, hold L1 and press: Square, Triangle, Square, Square, Circle, Circle, X, Triangle.

Revive all healths:
At the Main or Pause menu, hold L1 and press: Triangle, Triangle, X, Circle, Circle, X, Square, Square.

Invincible hostages:
At the Main or Pause menu, hold L1 and press: Circle, Circle, Square, Triangle, X, Triangle, X, Circle.

Unlock all doors:
At the Main or Pause menu, hold L1 and press: Triangle, Square, Square, Triangle, X, Circle, Square, Triangle.

More ammunition:
At the Main or Pause menu, hold L1 and press: Square, Square, Circle, Triangle, X, Triangle, X, Triangle.

No terrorists:
At the Main or Pause menu, hold L1 and press: Triangle, Circle, Circle, Triangle, Square, X, Triangle, Cirlce.

Upside down terrorists:
At the Main or Pause menu, hold L1 and press: X, X, Circle, Square, Circle, Circle, Triangle, Circle.

Supermen:
At the Main or Pause menu, hold L1 and press: X, Square, Triangle, Triangle, Circle, Square, X, X.

Baseball bat:
At the Main or Pause menu, hold L1 and press: Circle, Circle, Square, X, Triangle, Triangle, Circle, X.

Free-for-all:
At the Main or Pause menu, hold L1 and press: Circle, Triangle, Triangle, X, Circle, Square, X, Triangle.

All secondary pistols:
At the Main or Pause menu, hold L1 and press: X, Triangle, Square, Circle, Square, X, Triangle, Square.

All main guns:
At the Main or Pause menu, hold L1 and press: X, Circle, Circle, Triangle, Square, X, Square, Circle.

Access all levels:
At the Main or Pause menu, hold L1 and press: Circle, X, Circle, Square, Square, Triangle, X, X.

Player invincibility:
At the Main or Pause menu, hold L1 and press: Square, X, Triangle, Triangle, X, Square, Circle, Circle.

Carry all items:
At the Main or Pause menu, hold L1 and press: Triangle, X, X, Circle, Square, Circle, X, Triangle.

Show all Players in game:
Press pause and press X, X, X, Square, Square, Circle, Up, Up, Down, Up, Start. This code will open up different screens on your TV set, very small, to see the enemies and where they are and what they are doing. Also you can aim at the screens to have a cheap shot on them. When the code works perfectly, the screen will turn black and on again. Now with numbers of screen equal to the number of enemies in game.