Infinite Health: [Submitted by:Luggs]
At main menu press: Up, Down, Up, Down, Up, Down, Up, Down and X. Now, if done correctly, the screen is shaking. Start a game and save it after the first level. Reset the game and load the saved game. Start it and you have infinite health.

Invincibility:
Pause the game and press: Square, Square, Circle, Circle, Left, Right, Circle, Circle, Square, Square.

Four Players with USB:
Use an USB Keyboard and a USB Mouse and enter the Data into the Options. Use 3rd and 4th Player with USB-Items.

Gatling Gun:
At main menu press: Up, Up, Down, Down, Left, Right, Left, Right, Square, Triangle, Square, Triangle, Start.

Big Head Mode:
At main menu press: Left, Right, Left, Right, Circle, Circle, Circle.
Select the Mutators in the multiplayer mode and press X.
Choose the big head option and press Right, X.

Level Skip:
Pause the game and press: Up, Down, Left, Right, Right, Left, Circle.

Level Select:
After saving the current game, exit it and go the main menu. Select resume and the saved game. Press: Up, Down, Down, Up, Left, Up, Right, Down.

Mutator:
At main menu press: Circle, Circle, Circle, Up, Down, Down, Up, Circle, Circle, Circle.
Choose the multiplayer mode and select Fatboy Mutator.
To get thinner with your new Mutator, let yourself be killed. To get bigger, you have to kill someone.

Stealth Mutator:
At main menu press: Square, Square, Circle, Circle, Square, Square, Circle, Circle.
Select Stealth Mutator at the multiplayer mode.

99 Bullets:
Pause the game and press: Left, Right, Circle, Circle, Circle, Right, Left

All characters:
Press Start to pause game play, then press Left, Left, Circle, Circle, Right, Left, X.

All weapons:
Press Start to pause game play, then press Left, Circle, Right, Square, Right, Left.

All Levels:
Play the game and save it. Now load the game and enter before loading: Up, Down, Down, Up, Left, Up, Right, Down.

Level Skip: [Submitted by:Luggs]
Press Start to pause game play, then press Up, Down, Left, Right, Right, Left, Circle.

Bonus levels: [Submitted by:SNailB8ter]
Successfully complete the game on the inhuman difficulty setting to unlock 7 death match and 4 capture the flag levels. No additional two player levels will be unlocked.

999 Redeemers: [Submitted by:SNailB8ter]
Enable the *Invincibility* code when in the Face's Of World level for capture the flag. Get the Redeemer from the middle of either castle. They are found on the left hyper link. Then enable the *Maximum ammunition* code to get 999 Redeemers. Fall out of space and you will not die. Just press R2 to shoot the controllable rocket.

Infinate Ammo [Submitted by:phill white]
Pause game then press left, right, circle x3, right,left. If entered corectly the game will continue.