I don't pay much attention these days, but usually I hear mostly about developers/publishers dropping the Linux builds of their games, so I was surprised to see this one (Cateia Games) doing the opposite, adding Linux support. Not Proton supported or such but native, adding also some nice words in their announcements:

As far as our games are concerned, Linux is no longer a "second-class citizen", we're rolling out Linux support for ALL games in our catalogue and we will continue to support our games on all 3 major Steam platforms with updates from now on.

Everything works nicely, we tested the game on many Linux distributions as well as Steam Deck.
We built the game for Linux according to Steam developer guidelines so we don't expect much problems, but if you do encounter issues, please write in the Discussion forum and we'll investigate.

There's also a Linux readme coming with the games with some details about the builds and where to ask for support, so the intent seems real.
Now mind you, they are not a big publisher, not all the games are Linux ready yet, and the games themselves are not AAA stuff (some rather old), but still nice to see that for a change.

I'll post the link from one of their (many) announcements:
https://store.steampowered.com/news/app/288750/view/3781394975947063612?l=english