If you can believe it, the torrent for the bonus content, available on the Ice-Pick Lodge forums and PCGamingWiki, is still alive, after all these years. I just finished downloading today. It has good stuff: concept art and renders, 4-CD OST, audio interviews with one of the devs, a video interview with a dev, trailers, and a two part recording of KRI (Russian GDC per PCGamingWiki). Two things stand out about the KRI event: many people are drawing art on a canvas, and there is a very pretty Russian (I can't be sure, could be another nationality) woman modeling in the nude (in very skimpy shorts and only shorts). I agree with other people who asked this: why is this bonus content not on GOG, paid or otherwise?