IIRC UT2K4 shipped with a Linux port on the install media.

In college around the time this came out, there were beefy Linux machines in one of the libraries. You could ssh into them for homework, but you could also physically access them. Xenon, with Nvidia Quadro gfx is my recollection.

So, I would rsync the game to /tmp (no root access of course, and home quota was too small), walk over and enjoy it on high end hardware. Fun stuff!