Here’s the descriptive chapter from the game;
In this game, players take on the role of Archons, the human agents of the Demiurge who shape the universe according to their whim and will. Archons are mortal humans who possess incredible power, potential, and awareness.
The game master guides these Archon players through the game and takes on the roles of the supporting characters in the story. (See Being the Game Master, page 113.)
The Archons’ great potential is both their blessing and their curse. Inevitably, their actions catch the attention of the immortals. Archons threaten the primacy of the Eternals, who were once gods to humans and now rule as lords of the worlds beyond Earth. The Eternals strive to manipulate the Archons to maintain their dominance. Archons also challenge the terrible ambitions of the Titans, who seek to once again to rule the universe with their supernatural tyranny. The Titans are less subtle than the Eternals; they seek to destroy the Archons or anyone who challenges their violent ascension.
Ultimately, it is this struggle against the immortals, and even against fellow Archons, that guides each Archon’s fate. This is the plight of being an Archon—power, responsibility and difficult choices. Players explore this dilemma via their Archons, the “main character” each player portrays. Players guide the Archon’s fate and making significant choices about how he or she affects the fate of the Nine Worlds.
Nine Worlds uses playing card mechanics. The GM takes the characters through the Nine Worlds, testing to see whether any on the Archon’s might rebel and break reality.