Native Kingdoms is a free, international, massively multiplayer online game. It's entirely playable in a web browser, with no need to download anything. This game mixes genres in a unique way: it's a role playing game, a strategy game, management game and a political game, all rolled into one.
You will be immersed in Aztec Central America, about forty years before the arrival of the awful Conquistadores. You will begin the game as a humble vagrant but through perseverance and skill, you will eventually be able to move up in the hierarchy and take a significant role in the political life of the Kingdoms.
Source: The Developer Website.