This cheat will give you invulnerability for the first three
 stages and unlimited men for the last stage.  You must have
 STD.EXE, CITY.EXE, CLUB.EXE and MOON.EXE in your current
 sub-directory.

 Type From The DOS Prompt:

 ren std.exe std.cht
 ren city.exe city.cht
 ren club.exe club.cht
 ren moon.exe moon.cht
 debug
 n std.cht
 l
 e 1a81 eb
 e 10c6 0
 e 136e 0
 w
 n city.cht
 l
 e 6adf 0
 e 10b0 0
 e 1146 0
 e 1404 0
 w
 n club.cht
 l
 e 1ad7 0
 e 1edf 0
 e 1ef3 0
 w
 n moon.cht
 l
 e 225e 90 90 90 90
 e 3264 eb 0c
 w
 q
 ren std.cht std.exe
 ren city.cht city.exe
 ren club.cht club.exe
 ren moon.cht moon.exe

 You now have invulnerabilty and unlimited men!