New weapons:
Press [X + Square] eight times at the weapon options screen. Banana bombs, sheep bombs and a minigun will be available. Additionally, the Ninja Rope will be extra bouncy.

Unlimited banana bombs:
Pause game play and enter the options screen. Enter the weapons option screen and press Down, Right, X, Square(2), X, Square(2), X, Square(2).

All weapons:
Hold R1 and press [X, X, Circle] three times at the main menu.

Suicide mode:
Pause game play and enter the options screen, Enter the weapons option screen, and move the pointer away from the exit icon. Then, press X(4), Square(4), X(4), Square(4) for exploding sheep.

One hit point worms:
Set the move timer and round time to unlimited, do the same with round time. Press [X + Square] eight times at the weapon options screen. During game play, pause and select extra time. All worms will be reduced to one hit point. This is particularly useful it is your turn with one team left, and an airstrike is available.

Boxing match:
Start a fire punch, quickly hold Square press R1, L1, Circle. A boxing match featuring one worm from each team will begin. Defeat your opponent using just punches and dragonballs. Normal game play will resume after one worm is defeated.

Bonus levels:
Enter one of the following passwords to play the corresponding bonus level.

Level	Password
Hell	Hades/666
Woods	Forest
Candyland	Candy
Junkyard	Junk
Martian	Mars
H. R. Giger-type Alien	Alien
Polar	Artic