Age of Mythology: The Titans expansion pack adds a fourth mythology, the Atlanteans, to the existing Greek, Egyptian, and Norse mythologies. A new single-player campaign opens another chapter to the franchise's expansive folklore along with the addition of new scenarios. Atlanteans have the power to call upon the might of the Titan gods--such as Atlas and Cronus--multiple times throughout the game and upgrade human units to heroes. The Titans introduces 12 new god powers, 15 new human units, and 10 formidable myth units.