Quake 2 has been GPL and had Linux versions since forever, even official ones from id.

I assume this remaster uses the same engine. Maybe they used stuff from contributors/forks, that’s why they kept it open.

I keep wondering what’s the official way to link. I’ve seen these you’re showing, but also !news@beehaw.org which, as shown here, can automatically be converted into a web link format.

And then individual posts? If you crosspost, it shows just a web link again.