Stargunner [cheats] Cheat mode:
Press [Pause] and type imabigcheat to enable cheat mode. The sound of a bell will confirm correct code entry. Note: High scores are disabled in cheat mode. Enter one of the following codes to activate the corresponding cheat function. 

Effect / Code 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Power up current main weapon blast 
Plasma main weapon plasma 
Pulse main weapon pulse 
5,000 credits. cash 
Short term invincibility. flames 
Four nuclear weapons nuke 
Extra life life 
Jump to level in current episode warpto 
Standard Impulser engine impulse 
Hydrogen Ioniser engine ioniser 
Megapulse 2000 engine megapulse 
Gravdis 5 engine gravdis 
Enertron satellite ener 
Mineslammer satellite mine 
Dynamo 500 satellite dyna 
Removes top weapon t00 
Credit Drone top weapon t01 
Plasma Bomb top weapon t02 
Evolter top weapon t03 
Matter Disruptor top weapon t04 
Rebounder top weapon t05 
A-Matt Boomerang top weapon t06 
Fragmentor BE800 top weapon t07 
Bi Partical Cannon top weapon t08 
Flamer top weapon t09 
Ion Cannon top weapon t10 
Magnum 3000DX top weapon t11 
Dual Laser top weapon t12 
Torpedo Launcher top weapon t13 
Removes bottom weapon b00 
Credit Drone bottom weapon b01 
Plasma Bomb bottom weapon b02 
Evolter bottom weapon b03 
Matter Disruptor bottom weapon b04 
Rebounder bottom weapon b05 
A-Matt Boomerang bottom weapon b06 
Fragmentor BE800 bottom weapon b07 
Bi Partical Cannon bottom weapon b08 
Flamer bottom weapon b09 
Ion Cannon bottom weapon b10 
Magnum 3000DX bottom weapon b11 
Dual Laser bottom weapon b12 
Torpedo Launcher bottom weapon b13