One of the issues is that modern source control practices weren't really in play for 90s game development. The code for many Origin games, for instance, were stored on floppies that are long gone.
Man I loved that game. I think it was the first CD game I ever played, having gotten it on a compilation with Syndicate, Ultima 8 and Wing Commander 2, when my family got a Sound Blaster 16 in what...1993? Great games.