Cheats:

 RSGOODIES      All weapons and ammo
 RSKEYS         All keys
 RSLEVxx        Warp to level xx
 RSGOD          God mode
 RSEND          Ends the level
 RSGRAV         Gravity will be disabled
 RSNOWALLS      No walls
 RSDIE          You die
 RSFUEL         Refuel
 RSLIFE         Extra lives
 RSNUKE         All monster in the level will die
 RSDOC          Health
 RSSHIELD       Shield ON
 RSFLYxxyy      Jump to xx/yy coordinates of the game