Fusion
   By:  
   Release date: 1988

   The codes.

   Enter your name as SWAMP THING on the high score table. Now
 pressing T cycles through the extra weapons. B activates large
 bullets S provides shields and E brings up the cheat mode
 where levels may be selected by pressing the + and - keys on
 the numeric keypad.

   For a level editor hold Up/Left and press Fire. Then press E.