Enter any of the following at the password screen 
EXACTLY as they appear (capitalization is important).
Keep returning to the password screen to enter as 
many codes as desired. 

     Blizzard - Enable all codes 
     Stormlord - Disable all cheats 
     Vampire - Invincibility 
     Tornado - Have all weapons 
     Dark Angel - Primary weapons don't overheat 
     Chimera - infinite secondary weapons 
     Avalanche - Infinite afterburner usage 
     Hyrda - Have tons of tokens 
     Thunderchild - All ships available 
     Demon - Mission and Ending select