Games like Schwarzschild II: Teikoku no Haishin

If you finished Schwarzschild II: Teikoku no Haishin, the closest matches are Warhammer 40,000: Gladius - Relics of War, Warhammer 40,000: Sanctus Reach, Interstellar Space: Genesis, MegaMek and Fallen Haven. All 8 share its strategy genre and are ranked by how closely their themes and modes overlap.