I've just read that earlier this year, Jordan Mechner had found the source code for the original Prince of Persia for Apple II, and uploaded it on github. Apparently, this also includes game data as well.
The story of how the source was thought to be lost and then eventually found is recounted in Jordan Mechner's blog:
http://jordanmechner.com/blog/2012/04/source/
Here's another article about the event:
http://www.wired.com/gamelife/2012/04/p ... urce-code/
