Enter the following codes at the Main Menu:

DESTRUCT   Scorched Earth Game
ENEMY     Captured Enemy U-Fighter
STEALTH   Ninja Fighter
STORMWIND The Elemental Fighter
TECHNO    Experimental Fighter
UNKNOWN   TX SilverCloud
WEIRD     Carrot Food Fighter
NORTSHIPZ Nort-Ship Z

Enter the following codes during play:

InvincibleF2+F3+F6
Level SkipF2+F6+F7
Destruction ModeF2+F3+F5
Extra MoneyF2+F3+F10               
Gamma correctionF11                         
Super Turbo modeBACKSPACE and 1               
Blue shipTAB and 1           
Red shipTab and 2           
Souped-up red shipTab and 4     
Normal shipTab and 0              

Thanks to Revolution readers Gavin Steward, Ali Beydoun, Heba Beydoun, Argyl

Camelo, MAB, and Nour Beydoun!