The new possibilities of add-on turns the game by providing a new strategic dimension more in tune with reality. For any fan of Civilization is a must for an almost perfect result (missing a more advanced self-management of the workers and I do not understand why limit the trade routes on that basis, also at the religious level a multitude of possibilities for action have been added as fanatics, reversal of government ... but on this point it's still very limited). Me anyway, no question of playing the basic version without add-on! Oh also some surprising mistakes on the civiclopedia on the history of religions ... I think that point of the game was sloppy. For example to tell the story tongs and tables of the law it is written, "it is a legend" I find it very moved and inappropriate. Otherwise tip top!