Cheat mode: Press Select(10) at the title screen. Hold Up/Left
on controller two and Down/Right + A + B
on controller one, then press Start on controller one.
Release the buttons and press Start to begin the game
with invincibility. You can also press Select to switch
weapons.
Change graphics: This requires a Famicom's controller with the microphone
set to be triggered by a loud sound. In Japanese version, trigger
the microphone, then press Select(5) at the title screen.
Then, hold Left + B on controller two and Right
+ A on controller one simutaneously. Then, press Select
+ Start on controller one. Release the buttons and press
Start to start the game.
Super laser: Hold Up/Left + A + B and power
on the NES. Continue to hold those buttons, then press Select,
Start. Press Select during game play to enable the
super laser.
Full weapons: Press Select(10) at the title screen. Then,
hold Down/Right on controller two and press Up,
Left, A, B, Start(2) on controller
one. Press Select to switch between the five shot weapon
and the laser.
