Well that really was fast. Free Stars: Children of Infinity, the sequel to The Ur-Quan Masters (Star Control 2) is now confirmed to be supporting Linux (and macOS).
Just to add this: Star Control 2 is not only free (as in free beer), it is free (as in free speech). The open source project is hosted on SourceForge (yes, that still exists), and has a website that is worth checking out: https://sc2.sf.net/
Just to add this: Star Control 2 is not only free (as in free beer), it is free (as in free speech). The open source project is hosted on SourceForge (yes, that still exists), and has a website that is worth checking out: https://sc2.sf.net/