Imperial Empires: The Campaigns
At first if you are not a in a Native American civilization then you cannot control the Native American civilizations, but you are able to control their special units by building a Trading Post near their settlement and creating an alliance between you and the Natives. Forming an alliance with the Native Americans can also give you special upgrades to benefit you in exchange for resources. There are twelve Native American tribes to forge alliance with. Aztecs, Carib, Cherokee, Comanche, Cree, Incas, Iroquois, Lakota, Maya, Nootka and Seminole.
But there are three playable Native American civilizations. They are: Aztecs, Sioux and Iroquois.
Imperial Empires: The War of The Triple Alliance
In this game pack you have another one playable Native American civilization. It is Tupi. In addition the minor natives civilizations which you can forge alliance are: