Key Features:
Expanded Epic Game: The core game experience has been greatly expanded with the addition of new technologies (like Combined Arms), 27 new units (like the new 1-hex ranged unit Machine Gunner), 13 new buildings (like the Bomb Shelter), and 9 new Wonders (see below).
The city-state quest system has received a complete overhaul to decrease the importance of gold and add a whole range of new quests that further the narrative of the game, as well as make the diplomatic victory a more varied option. Send them out to establish surveillance of foreign cities, steal advanced technologies from your strongest or wisest competitors, or interfere with city-state alliances.
New Civilizations: The expansion will deliver 9 new civilizations, such as Carthage, Netherlands, the Celts, and the Maya (it is 2012, after all), along with their unique traits, units and buildings. Beliefs can even unlock custom buildings that only people of your religion can construct.