I've been able to get DOOM going, (with legacy_141_linux) and that's really cool. It sorta takes me back to the old DOS 6.2, 386DX, 8MB SIMM, 40MB MFM HDD, dialin' up to the BBS days.
But I digress.
I have a hexen.wad I'd like to revisit as well.
I've Googled "hexen linux" and downloaded a few port sources, but can't get any of them to compile and run...