Cheat mode
Enter Y, Black, White, Black, Y, X, White, X at the cheats screen under the options menu to unlock all cheats.

All options
Enter White, White, X, X, Y, Black, Y, Black at the cheats screen under the options menu to unlock all normal game options.

Level select
Enter Black, Y, X, White, Y, Black, X, X at the cheats screen under the options menu.

Super health
Enter X, X, Y, White, Y, White, Black at the cheats screen under the options menu.

Infinite ammunition
Enter Y, White, X, Black, Y, Black, X, White at the cheats screen under the options menu.

Infinite grenades
Enter Black, X, Black, Y, X, Black, X, Black at the cheats screen under the options menu.

Bouncy grenades
Enter Black, Black, Black, Black, Black, Black, Black, Black at the cheats screen under the options menu.

Gibby explosions
Enter White, Black, X, Y, White, Black, X, Y at the cheats screen under the options menu.

Gibby ammunition
Enter X, X, X, X, Black, Y, X, X at the cheats screen under the options menu.

Rapid rails
Enter Black, Y, Black, Y, X, X, White, White at the cheats screen under the options menu.

Fat mode
Enter Black, Black, Black, Black, White, X, Black, Black at the cheats screen under the options menu.

Walking dead
Enter X, X, X, X, X, X, X, X at the cheats screen under the options menu.

Wacky deaths
Enter White, White, White, White, White, White, White, White at the cheats screen under the options menu.

Rain of fire
Enter Y, Y, Y, Y, Y, Y, Y, Y at the cheats screen under the options menu.

Director's cut
Enter Y, X, Black, White, Black, X, Y, White at the cheats screen under the options menu.

Joke message
Enter Y, X, Y, X, Y, X, Y, X at the cheats screen under the options menu.