Full agree on Xonotic! Has also a somewhat active online play.

Opened a community to discuss non-commercial, underground games: https://lemmy.ml/c/undergroundgaming

Opposed to most other people here I would like to say that making your game support dependent from a software that 95% won’t be able to install or use without getting a partly closed source DRM “app-store” software is - in my book - a bad idea.

Won’t buy any games that have no native support.

undefined> OpenSuse

You are welcome :)

Recommending OpenSuse. Its not hard to set up your GPU there anymore, you are less gimped than with Ubuntu, and you’ll have a more widespread and mature community than with PopOS, resulting in more software to be available.