probably a good time to post this. I've dockerized unreal tournament 2004, it runs ok on linux x86_64:

    mkdir -p ~/.ut2004/; sudo docker run -it --rm -e DISPLAY=$DISPLAY -e XDG_RUNTIME_DIR=$XDG_RUNTIME_DIR -e HOME=/ --network=host -v /tmp/.X11-unix/X0:/tmp/.X11-unix/X0 -v /run/user/$UID:/run/user/$UID -v ~/.ut2004/:/.ut2004/ --user $UID:$UID --privileged --name ut2004 ikuinen.earth:5000/ut2004