Beat the following levels on Story Mode under Medium difficulty:
To Get BeatOzor Mox 2280 Return to Planet X
Sadako 2019 NeoTokyo
The Colone l1853 Wild West
Khallos 1972 Atom Smasher
Stone Golem 1920 Aztec Ruins
Get Streets Arcade level and Cardboard Characters:
Beat the game under Easy difficulty
Get Lean Molly & Hector Babasco:
Get a gold medal in Adios Amigos on Arcade mode.
Unlock Sewer Zombie:
Get gold on Behead the Dead level.
Pause the game and press Square, Circle, Left, Right, Circle, Square.
Level Advance:
Pause gameplay Up, Down, Left, Right, Right, Left, Circle. By performing this code you will instantly complete the level and charge on to the next.
Unlock Every Level:
To enable this code you must first play the game and create a save. From the Main Menu select Resume Game. On the Next screen highlight your save and enter the following code: Up, Down, Down, Up, Left, Up, Right, Down.
Skip Levels:
During gameplay, hit pause and press Up, Down, Left, Right, Right, Left, Circle.
Fatboy:
To unlock a new Mutator that makes you get fatter and fatter with every Frag, and skinnier and skinnier with every time you get Fragged, just perform the following code. At the Title screen enter: Circle, Circle, Circle, Up, Down, Down, Up, Circle, Circle, Circle. You can now go to Multiplayer Mode and there will be a new Mutator called Fatboy. Turn this Mutator on and enjoy the antics.
God Mode:
When paused, press Square, Circle, Left, Right, Circle.
All Ammo:
When paused, press: Left, Right, Circle, Circle, Circle, Right, Left. (raises ammo stats to 999)
Unlock Big Head Mutator:
At the main menu, press Left, Right, Left, Right, Left, Right, Circle, Circle, Circle.
Unlock Stealth:
In the main menu press Square, Square, Circle, Circle, Square, Square, Circle, Circle. All players are equipped with cloaking devices.
All Characters:
Press Start to pause the game, then press Left, Left, Circle, Circle, Right, Left, X.
Unlock any cheat and "Cheat Mode' will appear at the options screen.
Invulnerability:
Get all gold medals in Grand Prix Championship to unlock Invulnerability at the cheat menu.
Runaway:
Get all gold medals in Crash mode to unlock Runaway at the cheat menu.
Drivers Ed car:
Get all gold medals in Driving 101.
1997 Eclipse and 2001 Focus SVT:
Beat Custom Championship twice.
Two player Pursuit mode:
Beat Pursuit 3.