Cybernator
Six continues
-------------
Hold Up + L + R, and press Start at the Konami screen.
Nine continues
--------------
Hold L + R and press Start(5) at the title screen.
Unlimited napalm
----------------
Walk through the first mission without shooting or
hitting any targets. Your score should be 0 points.
Defeat the Boss without shooting its side gun turrets.
Your score should be 2800 points. When the asteroid
level begins, press X to change weapons until the
unlimited napalm gun is selected. Survive this mission
to keep the unlimited napalm for the remainder of the
game. Note: It cannot be powered up.
Hint: Failed ending
-------------------
Go through the first level, and do not destroy the Boss.
Finish the rest of the game to see the failed ending in
which everyone dies.