You can't anymore besides used physical copies. Epic delisted all the Unreal games.
Yes, I recently found that out. I bought Unreal on GOG a few years back and was wanting to get Unreal Tournament 2004 recently (I played a bit of the demo back in 2005 or 2006) but currently no digital options.
Why do you assume they didn't?
> I still boot it up to play occasionally
i would buy instantly if it works on linux on 64 bit machines. all of them.