Chariots of Wrath
Press the full stop (period) while playing the game to get infinite lives.
This cheat is sometimes difficult to get to work. Try both the full stop (period) on the main keyboard and the one on the numeric keypad several times.
While you're in the spaceship mode, hit the function keys to get weapons.
When you have a weapon, press * or 8 (both on the keypad) to power it up.
Or, move the joystick forward when you're instructed to press Fire to start. You get infinite lives.
(these all need testing) Tried these cheats and not been able to get any of them working