I Hate Running Backwards, originally called Serious Sam: I Hate Running Backwards is an absolutely mental never-ending shoot 'em up and it's now on Linux.
RocketWerkz, the studio founded by Dean "Rocket" Hall will seriously consider a Linux version of their detailed space station construction and management game Stationeers if it gets more sales.
Following the news that the explosive vehicular MMO, War Thunder, had a work-in-progress Vulkan render, I got in touch with the developer to ask about their experiences working with Vulkan and bringing their game to Linux.