This is spectacular. I really wish more great old game developers would do stuff like this. Not having the source code to the greatest games of our time is like having only half of the bible, or War and Peace. Or only half of Snowcrash or Neuromancer. Imagine!

Bill's also not the only developer who has this stuff in the garage. I think the IP rights are just tricky to deal with, so few developers are comfortable dumping this stuff into github yet.