During gameplay press 'Start' to pause the game and then press and hold L, R, Triangle and Left on the D-Pad at the same time to bring up the 'Cheat Console' screen. Then enter the following codes to enable the corresponding effect in the game, if you have entered the code correctly a message will appear on the screen as confirmation.

ALL Characters Visible:
Press Left, Square, Up, Triangle, Down, Cross, Right, Right.

Unlock ALL Weapons:
Press X, Square, Triangle, X, Square, Triangle, Left, Right.

Unlock Infinite Ammo:
Press Square, Square, Triangle, Triangle, Left, Right, X, X.

Player Invincible:
Press Square, Up, Down, Down, X, Left, Up, Down.

Player Invisible:
Press Right, Left, Right, Left, Down, Up, Right, Left.

Player and Officers Fully Promoted:
Press Square, Square, Triangle, Up, Up, Down, Down, square.

Officers Invincible:
Press Triangle, Up, Right, Right, Right, Left, Left, Left.

Civilians Invincible:
Press Up, Up, Up, Left, Down, Up, Up, Right.

No Sounds:
Press Up, Down, Down, Left, Up, Down, Down, Down.

Stop Timer if Active:
Press Square, Triangle, Left, Up, Down, X, X, Down.

Unlock Remixed Credits
Press Up, Right, Left, Right, X, Right, X, Right.