Myth

Unlimited lives:
Load the following file from the program disk instead of the main game file.
LOAD "M2",8,1

Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 24830,165

Stage skip:
Hold [Left Shift] + [Right Shift] + [Commodore] + [F1] during game play on level 1 to advance to the next stage.
Note: This only works in the System 3 version of the game.

Full weapons:
Press A + / during game play after level
1. Note: This only works in the System 3 version of the game.