4X turn-based strategy game "Leylines" was originally released back in 2019 but it's now available on GOG. It was also already available on Itch so fans of DRM free have options. Leylines has a native Linux version. https://www.gog.com/en/game/leylines https://radiant.itch.io/leylines?ac=Q8uS8a4hVvG