Here are some cheats and tips for the game Action Fighter.
Cheat mode:
Enter one of the following codes at the name screen. Note: The
procedure to do this can be found on page 7 of the manual.
Letters A, B, C, D collected
Enter HANG_ON[Period].
Invincible to bullets
Enter SEGA[Period].
Letters A, B, C, D, collected and invincibility
Enter SPECIAL[Comma].
Three extra lives after time reaches zero
Enter GP_WORLD.
All cheat features
Enter DOKI_PEN.