The developers of Lifeless Planet [Steam, Official Site] have continued to improve their Linux beta, as it's now running on Unity 5 and has the improved graphics from the PS4 version.
Posting on Steam the developer added this edit to the post:
QuoteThe new beta is up! Improved graphics from the PS4 release (running on Unity 5 now, new player model, etc). We think all known bugs including steam achievements are fixed. Please check it out with the instructions above, and we'll set it official in a few weeks if all goes well. Thanks as always for your support!
The developer then posted here to say they hope to officially launch the Linux version within weeks.
I look forward to testing it when they release it officially, but I'm holding off until then.
About the game
While seeking life on a distant planet, an astronaut discovers an abandoned Russian town. He suspects his mission is a hoax until a mysterious young woman saves him from a strange and deadly phenomenon... Lifeless Planet is a third-person action-adventure that features an old-school sci-fi story and spectacular environments in the spirit of classic action-adventures.