Various cheats
     Push  O  to  enter  the  options  screen,  now  submit one of the
case-sensitive  codes  below  to  enable  that  particular cheat code.
You'll hear a ring if entered correctly

Cheat code:   Effect:
MONEY         $1000 for main character
HEAL          Team heal
AMMO          Team unlimited ammunition and armor
EXP           2000 experience
NOHIT         Team invincibility