saldite: Well, the downloads on the main site for the game are currently broken, so I sent an email to the support line asking for them to be fixed. I also threw in a word about how GOG now offers Linux versions, as well, for an alternative, so I guess we'll see if anything comes from that.
EDIT: I figured I'd add onto this that apparently he gave GOG the linux version years ago when the game first launched, but at the time they didn't support linux so nothing came from that. He mentioned it on the steam greenlight page for TRT. So it's possible the Linux version might be in GOG's hands and they just haven't done anything with it yet.