I have a special place in my heart for UT2004 because it was one of the very few games that had an official native Linux version at the time. I think I enjoyed the fact that it was running on Linux more than I enjoyed the game itself.
In retrospect, I have a much greater appreciation for Windows 2000. User experience was really front and center in a way that we seem to have gotten away from since Web 2.0. It basically never blue screened. Games ran well. Personal computing seems to have taken some steps backwards since then.
IIRC, I bought the metal case for UT3, but the linux binaries never appeared ...