Ok thanks, I'm donwloading wine now. Is this something that I'll need to manually start each time I boot up my machine?

I believe that you are trying to use the Linux version of the UT Demo? Correct? If so you dont need wine. Wine is for running windows programs in Linux; an emulator. You normally run a program with the 'wine programname' command.

If I recall correctly the linux demo version only supports 3dfx cards (Glide renderer), it was never updated to use OpenGL like the full version is (it's in the readme somewhere).

The full version works fine natively and is very cheap (if you can still find it). Any reason why you want to run the demo?

Just because it's free i guess lol.

So, I won't be able to use it unless I have a different video card, correct?

As far as I know the renderer works with 3dfx cards. Have a read of the readme, it should say more info there.

I was trying to install it myself to code some anti-cheat mods for a guy that runs a demo league. I couldn't get it to work and ended up installing windows + the demo on a partition just to compile and test code. There are still some people that play the demo and some funny mods for it too, but I really don't like keeping windows around just for that.

I had a little success with wine + the windows version , but it was too laggy to play seriously.