Stasis is free on GOG for the next 2 days or so
It’s from the same developers that made Beautiful Desolation, and while I did not like it that much, it was still a pretty impressive game.
Entirely unrelated, but funny enough, in my comment about Beautiful Desolation I closed with mentioning Crusader Kings III, and just this week I dusted that off to start a new campaign, now that the world has been expanded to include most of Asia. I think The Great Circle will have to wait …