Empire Earth 2 and 3 come to mind, the first had such fun and interest in it, all the rest could boast is better AI and perhaps slightly "better graphics" however imo, the 3rd had better graphics, the 2nd has boring graphics, hwoever the 3rd didnt rly have a campaign and there were very few units and diffrent Epochs to go through in comparison to the original, it seemed to kill the game imo......and it certainly destroyed the series for me