Two expansion packs have been released: the first, Age of Empires III: The WarChiefs, was released on October 17, 2006, and introduced three Native American civilizations; the second, Age of Empires III: The Asian Dynasties, was released on October 23, 2007, and included three Asian civilizations.
Tivo dúas expansións: a primeira, Age of Empires III: The WarChiefs, foi estreada o 17 de outubro de 2006 e introduciu tres civilizacións nativas americanas; a segunda, Age of Empires III: The Asian Dynasties, foi estreada o 23 de outubro de 2007, e inclúe tres civilizacións asiáticas.