Games like Schwarzschild III: Wakusei Desperan

If you finished Schwarzschild III: Wakusei Desperan, the closest matches are Galactic Civilizations II: Dread Lords, Starfleet Orion, Invasion Orion, Arcangel: The Legacy of Peace and Hisou Kihei X-Serd. All 8 share its turn-based strategy (tbs) genre and are ranked by how closely their themes and modes overlap.