Complete the first action segment, then move the pointer to the "Shield" box in the to left corner of "The Armoury" screen. Hold [Keypad Plus] and press Fire. The screen will flash to confirm correct code entry. Refill energy to all the weapons. Shields can still be depleted when hit, but the ship will be indestructible when they reach 000. Additionally, press one of the following keys during game play to activate the corresponding cheat function.
Skip action sequences
Select various weapons
2 to 9
Select more weapons
0, [Minus], [Equals] or [Plus]
Remove extra weapon
Wait until cargo/energy screen appears, move the cursor to the
top left-hand corner with the joystick, then press fire and
'+' on the keypad simultaneously. The screen should flash and
you will be furnished with infinite shields and lives.
To get to the end of the game, simply go to the outer-most planet.
F1 - disables enemies
F6 - replenishes energy
0-9 - different weapons