As reported by GamingOnLinux, the folks behind the modern Myst-like Quern have a native Linux demo out on Steam for an exploration-heavy first-person adventure game called Dimhaven Enigmas.
There’s a Kickstarter with tons of additional information.
In an age of native Linux support getting dropped or passed over I hope it goes well for them.
And if you’re into that sort of thing, Quern is currently 80% off. (Though it’s also 80% off if you’re not into that sort of thing)
I just finished Quern on the weekend. Beautiful and fun game, but the puzzles really challenged my little brain.