Mach 3

Cheats

 For invulnerability in this game, use the DOS utility DEBUG.
 First backup your game to be edited, then type the following
 from the dos prompt:

 ren e:\mach3.ov2 cheater.cht
 debug e:\cheater.cht
 e 261f 90
 w
 q

 Then rename CHEATER.CHT back to its previous name.