Hellraider

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 raider.exe cheater.cht
debug cheater.cht
e 1460 f8 c3
e 920 90 90 90
e 901 90 90 90
Then type:
w q
Then rename CHEATER.CHT back to its previous name.