Sins is definitely not an easy game and much of that is because of the AI behavior. Besides the lackluster diplomacy system, there isn't much to fault the game for. In fact, it is a wonderfully entertaining game. When you first lay your eyes upon it, it may seem a little deeper than it is but it does deliver the goods nonetheless. If you love a good 4X challenge, Sins of a Solar Empire is a great game that will keep you busy for a long, long time.