Fedora and Debian get their arse to Mars with the help of #dhewm3, #LibreCoop, and #Linux.

https://linuxgamecast.com/2021/03/doom3-co-op-on-linux-ep01/

Playing Doom 3 co-op (librecoop mod) on OpenBSD

https://videos.pair2jeux.tube/w/rF3QkA8w8fqUU1cnzW5sPT