As a lover of all things space and sci-fi, Earth Analog looks like it could be a lot of fun to explore. Funcraft Games have also said it's going to be supported on Linux.
Earth Analog is a story-rich space flight adventure, where you're travelling through deep space to find a new home and you get to explore various weird and wonderful worlds that can often be dangerous. Exploration, ship maintenance, ship upgrades, mining and more will be needed to keep going on the journey. If you're a fan of movies like Interstellar, Funcraft said you should feel right at home. Sounds like a more focused and smaller No Man's Sky a little perhaps.
As for Linux support, they posted on Steam in a topic themselves to explain that "Yes, there will be a linux build. I promise it will be the first thing on the list after the release of the game on PC." (by PC they mean Windows of course) as it seems they've been asked a lot about this.
- An intriguing single player adventure based on a story full of drama and plot twists.
- An atmospheric and newtonian flight model.
- Solve each planet's dangerous mysteries.
- A vast universe to explore with both hand-crafted and procedural fractal-based planets and stars.
- A fully ray tracing based graphics engine bringing never before seen worlds to life.
- HOTAS support.
You can follow Earth Analog on Steam.