AD 2045. Earth is ravaged by a catastrophic event the survivors would come to call the "Red Cataclysm". Demonic beings of unknown origin overran the planet, reducing the global population by 90%.

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In the centuries that passed, under the protection of the mystical "Light Trees", humanity has learned how to survive in this dangerous new world.

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Deep in the remains of the former United States lies the city-state of Olympus. It is here an experimental force is born with the hope that they may one day lead humanity to take back their world. This operation came to be known as...

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...The ORPHEUS PROJECT