During a game, hold L1 + L2 + R1 + R2, then choose the codes from below:

Cheat Code	Code
God Mode	Up, X, Left, Circle
Invincibility	Up, Down, Left, Right, Right, Left, Down, Up
One-Hit Kills	X, X, Up
Powerful Machine Guns	X, X, Triangle
Weapons Become Health	Triangle, X, Square, Circle

Change Weapon Display

During a game, hold Select, and press Right.

Change Camera Angles

During a game, hold Select, and press Down.  To change within Horizontal and Vertical, hold Select, and press Left.

Unlock Mini-Suburbs in Multi-Player

Get 10 kills in Survival Mode in the Drive-In Level.

Unlock the Freeway Level in Multi-Player

Get 10 kills in Survival Mode in the Snowy Roads Level.

Unlock Secret Area in Zorco Bros.

Shoot down the airplane that circles the level with a homing or fire missile.  It will crash by the sewage and will unlock a path through the ground.

Unlock Warthog

In Story Mode, blow up the pizza boy statue with a gas can or two.  A ramp will form by the falling magnet.  Use the ramp to jump on top of the disc.  It will rise to the top and you will see a black cube just off the disc.  Jump to get it and unlock Warthog.  Also, if you shoot the buildings next to you while in the air, it will unlock a small platform with weapons.

Unlock Minion

Beat the game with every character.

Bonus Health

After killing someone, the car explodes and the character will run away on fire.  If you hit them, you will get a health bonus.