Commander Keen 2

An editor cheat -- By Simon Burrows
Here's a hack for an incredibly old game some of you out there
might still be playing: Commander Keen II. To use it, load the
game, save your position in slot one, then quit back to DOS.
Now, with a Hex-editor such as NU or PC-TOOLS, pop-up the file
SAVED1.CK2 from the main game directory. Then, using the Nos.
at the top-right hand corner as a guide, make your way to the
following hex-locations and.... Hex location Change To
-------------------------------------------------
Offset 50, Hex 32 04 FFOffest 52, Hex 34 03 FF
Offset 55, Hex 37 00 00 00 FF FF 37
This will give you 255 lives and shots, and a score of about
900 million points!! Go get 'em, Billy.