Games like Warhammer 40,000: Dawn of War II - Retribution: The Last Standalone

If you finished Warhammer 40,000: Dawn of War II - Retribution: The Last Standalone, the closest matches are Endless Space 2, Age of Wonders: Planetfall, Planetbase, Star Control: Origins and Ashes of the Singularity. All 9 share its strategy genre and are ranked by how closely their themes and modes overlap.