While Kerbal Space Program 2 has been announced (sadly not for Linux), developer Squad is not finished with the original and several big improvements are on the way.
Developer Luxorix Games and publisher Alawar Premium are currently working on Space Robinson, an action RPG with a fun graphical style that's supposed to really test you.
Trese Brothers just recently put out a massive update to their impressive and engrossing space RPG Star Traders: Frontiers, along with a nice sale to go along with it.
Smith and Winston is a twin-stick shooter made entirely out of really small voxel blocks, it looks awesome and the destruction possible is also pretty amusing.
Space Haven from Bugbyte Ltd continues being shaped into something special, with a third Alpha version now available for this unique colony building sim.
What’s the one game keeping you a dual booter? Maybe it’s PUBG, or Rainbow Six: Siege? Maybe it used to be Overwatch? For me, that game was Elite Dangerous, and one year on from Proton’s release, I have a story to tell.
EVERSPACE is probably one of my absolute favourite space shooters from the last few years, so I'm extremely excited to see EVERSPACE 2 be announced and confirmed for Linux.
Set Phasers to fun sci-fi fans, as Realmforge (Dungeons 3) and Kalypso Media just announced Spacebase Startopia and it's confirmed to be supporting Linux.
Currently in development by Beard Envy with publishing from Kasedo Games, the puzzle game Filament has you exploring a seemingly abandoned spaceship while sorting out all the cables.
Mono Studio have given an update on the next major version of the dieselpunk sci-fi RPG INSOMNIA: The Ark, seems like the Linux version is finally getting close.