Cheat mode...
	Extra difficulty levels...
	Invincibility...
	Level skip...
	View game code...

Press Start at the title screen. Press Up, Left, Right(2), Up when the "Game Start" and "Config Mode" options appear. The sound of an explosion will confirm correct code entry. Press Left or Right when "New York - Stage 1" appears to change the starting level.

Press Start at the title screen. Press Up, Down, Left, Right, Down, Start when the "Game Start" and "Config Mode" options appear. The sound of an explosion will confirm correct code entry. New difficulty levels will now be available. The "Training" difficulty setting will allow the game will continue from the last point played instead of restarting at the beginning of the level.

Press Left, Right, A + B + C at the main menu. A sound will confirm this part of the code. Then, press B, A, C, A, Left(2), Right, Left.

Enable cheat mode. To skip levels, press Start during game play. Press Start during the last level to view the credits and ending sequence.

Enable cheat mode. Press A + B + C during game play to overlay the hexadecimal programming code over the game screen.