The Lemnos Factory was a large bio-metal production facility built on Mars by the Olympian Council.

Lemnos was the only facility capable of producing strain-5 bio-metal, making it of the utmost importance that the Olympians kept the facility secret from the Hadean Crown. To this end Lemnos' transport ship, the Hephaestus, was equipped with stealth technology before it transferred its cargo to the Omega Star Port for use by the Hercules Brigade and Olympian Armada .

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