[bayindirh]

UT2004 shipped with its Linux binaries in the 3rd disc. I remember playing it a ton until migrating to 64bit system.

Wish they GPL that one, too, so we can build a 64bit version of that.

[KETHERCORTEX]

There's a Flatpak package for UT2k4 on Flathub that launches on modern 64 bit systems. You just need to provide game assets and enter CD key.