I had to look up what the “empire” is because I’m not familiar with Russian propaganda. It’s NATO and Western allies, and apparently they’re better at manipulating Ukrainian foreign policy than Russia is, so Russia’s only option is to go to war.

https://openarena.ws/svn/source/assets/COPYING

It’s definitely done, apparently new development is still happening, but there hadn’t been a new release for a long time.

Assets are licenced under the same licence as the engine, GPL2.

Licence for game assets: https://github.com/OpenArena/gamecode/blob/main/LICENSE

How about open arena? http://www.openarena.ws/

Kubernetes is probably overkill, docker compose will work fine for most home labs. But I agree with your point, declarative infrastructure makes life so much easier, even for home labs.