Wow, I didn't see that coming. I'll check out the demo at the very least. I don't know much about the game except I remember hearing about it way back in 1998 and was equally surprised when it came out all those years later.
Nothing new, a working version of the demo existed back in 2006. It was ported from the binary by the alky project (now dead). It is the same team that ported halo2 pc to XP. They have some kind of auto reverse engeneering tools (GPLed) to translate DX code to OpenGL. The game have always been close to work under Linux.