From Ensemble Studios/Microsoft - Age of Mythology: The Titans adds a fourth mythology, the Atlanteans, to the existing Greek, Egyptian and Norse mythologies in Age of Mythology. A new single-player campaign will add yet another chapter to the expansive panoply of ancient folklore along with the addition of new scenarios. Atlantean players will be able to call upon the might of the Titan gods (such as Atlas and Cronus) multiple times throughout the game, and may also upgrade human units to heroes. The expansion pack will introduce 12 new god powers, 15 new human units and 12 formidable myth units to the game.
From Guide - The Titans expansion, much like the expansions for the other Age series games, adds powers, units, technologies, a new civ, and more to the game. Most notably is the colossal Titan unit that can in one fell swoop, change the outcome of the game in one's favor. The Titan can literally bring a civ up from the ashes and lay waste to all in it's path.
The new civlization and campaign included in The Titans is the Atlantean mythology. Like most expansions, you will need the original game in order to play.
