https://github.com/OldUnreal/FullGameIn ... ster/Linux
I thankfully managed to fix the issue by renaming two library files as it seemed to be looking for slightly different file names when running through the terminal:

It was those two files highlighted above. I think the original names had the version number at the end so just changed it to exactly what Konsole was looking for.
I was just wondering if the development team were aware of this and if it could possibly be fixed? I also noticed some of the controller bindings were off as the left analog stick was set up for aiming.
Hope that helps and as I said I don't have any problems with the Full Installers for either UT99 or UT2004.
