I bought this game on as sale to play Caveman2Cosmos mod, the civ 4 UI isn't the best, especially managing many cities is tedious, but all the different management angles and diplomacy and the detailed technologies and concepts in caveman2cosmos mod make the game fun. If you want borderless fullscreen window, use the free software 'Borderless Gaming' App available on github. (win +F6) It works well on windows 10.
