A role-playing game set at the fringe of contact between the Old and New Worlds in an alternate history in which the Aztec Empire never fell.
The setting is Middle America in 1665. Using their ancient powers of sorcery, the Aztecs have been fighting off Spanish conquistadors for almost 150 years. Although getting incredibly wealthy from their New World mines and the plunder from conquering smaller indigenous groups, the frustrated Spanish nonetheless continue their crusade against these native warriors and their heathen spellcasters. Pirates and privateers from other European nations like the English, French, and Dutch prowl the Caribbean preying on fat Spanish galleons laden with treasure. American Indian tribes struggle against their traditional rivals as well as invaders from the East. Combining African magic with secret knowledge gained from both the Europeans and the New World cultures, escaped slaves form secret colonies and wreak havoc on their former masters. Explorers delve into Tierra Incognita in search of El Dorado, the Fountain of Youth, and the Seven Cities of Cibola. In the midst of all of this a comet streaks through the sky allowing a secret cult to open a gate to the Realm of Fear.
The system uses a core mechanic that allows players to decide how their characters are expending effort. Action is cinematic (rather than realistic) and heroic (rather than gritty). Players make tactical decisions in a system that rewards creative and interesting stunts, thus keeping the game exciting on both narrative and mechanical levels.