Empire building games, to me at least, have never been about campaigns. Each game is a fresh start for me to try new things and win or lose by them. The campaign portion of this expansion is not something I am ever going to touch, so there is some ok additions to the core gameplay to make each race feel a little more distinct, but in the end you are playing basically the same game you have been playing, against the same AI(still a good challenge, but not even close to playing against or with another human being).
If you want a good single player game, this expansion offers some extra features(not a ton, but a decent amount) but if you want a more social gaming experience you can pass on this and subsequent galactic civ titltes until they decide that they want to support multiplayer.
Now I am just going to have to sit and wait for Civilization 5... or maybe some other 4X surprise.
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