Games like Stellar Monarch 2

If you finished Stellar Monarch 2, the closest matches are Sid Meier's Civilization II, Age of Wonders: Planetfall, Warhammer 40,000: Gladius - Relics of War, Master of Orion II: Battle at Antares and StarDrive 2. All 9 share its strategy genre and are ranked by how closely their themes and modes overlap.