What Sapi is also saying, besides from factions being unlocked, is that if you have not completed the victory conditions by the time the number of turns is up, you lose.

Of course, you can always keep playing for the enjoyment, I wouldn't like it if i didn't care about the games victory conditions (I play with my own conditions in place hehe), the turns were up, then the game finished and i wasn't able to play anymore. I like things being "open ended".

But that brings up a thought, whats the latest Date anyone has played to? As in past the "end" of the game?