Well, unlike MoO2, hopefully it won't have such a signifigant "end game" problem like alot of strategy games.
Where you know you've won, it just takes 5 more hours of actual playing to get there. That kills me.
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One of the nice and/or annoying things about this is that if youu're crushing one enemy, he might surrender all his planets to you or another civ, making wars against weaker civs faster. Diplomatic victory is pretty easy, just ally with everyone.