The real reason the source of Blake Stone was not released is two issues:
1. Legal concerns with Apogee & GOG.
2. The original floppies had bit rot - However the sources of Planet Strike were discovered and sitting on a CD/DVD currently.
We have been tossing around the idea of doing a port of the game to other platforms (XBOX, Android, IPhone, etc) however the time and effort involved is out of budget with other projects. Not to mentiod issue #1 still remains.
Thanks for helping make Blake Stone! It was the first game I ever completed as a kid.