I don't have idea is it known or not...
At KBW's site I've found a very interesting archive with included prototype and source code of unrealeased Corridor 8 - Galaxy Wars. Here's the link:
http://users.adelphia.net/~bcbjr9760/c8gwsrc.zip
Design documentation (PDF):
http://corridor7.tripod.com/files/c8desdoc.zip