Thirty Continues
Press Select(7) on controller two at the title screen. A sound will confirm correct code entry.

Special Weapons
Press Start(7) on controller two at the title screen. A sound will confirm correct code entry. Nine additional weapons will be available for selection.

Extra Easy Difficulty
Press L(7) on controller two at the title screen. Set the game to the Dynamic setting.

Extra Hard Difficulty
Press R(7) on controller two at the title screen. Set the game to the Almanic setting

Play as Bosses
Hold L + R on controller two when starting a new game. Use controller two to play all Bosses in the game.