KKND 1: Xtreme

KKND 1: Xtreme cheat codes: 
Save Game Oil Cheat
A cheat to get heaps of oil credit in KKND or KKND Xtreme
Begin a level and then save the game.

Use a hex editor - I use XTGOLD -
In XTGOLD highlight the saved file and then press
V for view, H for Hex, E for edit. After you have
edited the hex press enter, Esc
and quit XTGOLD. Now go back to KKND/KKND Xtreme
and restart your saved game.

In the Survivors levels the first line of your hex will look
something like this:-

000000 0100 0000 0000 0000 0000 0000 0000 0000

Regardless of the numbers that may be in your saved game
change this to:

000000 0100 0000 0000 0000 F301 F301 F301 0000

This will give you over 32 million oil credits.

In the Mutants levels your hex will look something like this:-

000000 0200 0000 0000 0000 0000 0000 0000 0000

Change this to:

000000 0200 0000 0000 0000 0000 FFFF FFFF FFFF

This will give you a negative oil figure with the result that
you will never run out of oil credits.