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: (VGA game cheat only!)
 
 ren cfs.exe cheater.cht
 debug cheater.cht
 e 3efa eb 07
 e 3f0f 90 90 90 90 90 eb 1d
 e 3fd6 c3
 Then type:
 w
 q
 
 Then rename CHEATER.CHT back to its previous name.