Sword Of Sodan

Cheat mode:
Enter NANCY or RAD as a name at the high score screen to enable cheat mode with unlimited lives.
Press [Enter] to advance to the next level.

Cheat mode (alternate):
Begin game play, and achieve a score that will be displayed on the high score screen.
Enter any name at the high score screen, then begin another game.
Press Fire to move around and find a safe location.
Stand at this location, type discoverysoftware, then press [Enter] to enable cheat mode with unlimited lives.
A message will confirm correct code entry.
Press [Enter] to advance to the next level.

Unlimited lives:
Select a player, begin game play, and intentionally die.
Play again with the same character, and repeatedly press [Enter] while the game loads.

Unlimited lives (alternate):
Begin game play as the "Hero" and intentionally lose all lives on the first screen.
Select the "Heroine" for the next game to begin with unlimited lives.