Rabidgremlin

So I recently found the binaries for a shareware game I released almost 30 years ago. Unfortunately I don't have the source code so cannot generate the "key" to unlock all the levels of the game. I'd like to put the unlocked game up on the web.

You can play the game here: http://play.rabidgremlin.com/gridlok/ (I'm pretty amazed you can play an old DOS game in a web browser) and download the game's files here: http://play.rabidgremlin.com/gridlok/gridlok.zip

The .zip file has GRIDREG.EXE which was used to create the unlock key. Also I guess it would also be possible to patch GRIDLOK.EXE so that it thinks it's registered.

Figured it might be a fun challenge for someone out there!