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This page is about the Poseidon Energy company. For the location in Fallout 4, see Poseidon Energy (location).

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Begin your Odyssey with us.

Poseidon Energy was a pre-War energy conglomerate that operated a number of oil rigs, factories, refineries, gas stations, and power plants and with further operations in military defense contracts.


Poseidon Energy was focused on renewable and non-renewable power sources on both the east and west coasts of America, as well as research and development of new, more powerful weapons through their subsidiaries, so long as they remained profitable.[1] Utilizing PoseidoNet, a national transfer system that provided communication between various facilities including Gecko's nuclear power plant, Enclave Oil Rig, Navarro, HELIOS One, the power plants of Appalachia, and other locations throughout the United States.

Poseidon Energy had several subsidiaries, projects, and products. Poseidon Gasoline served as the face of the gasoline market.[2] Poseidon Energy, while also focusing on gasoline and oil production, involved itself with a number of alternative energy sources as well, such as solar and an affiliate, Petró-Chico in Mexico. The company utilized the Poseidon Power Management System in Appalachia to operate its nuclear power plants.[3] The U-235 series outboard motor was developed by the company, advertised as an atomic outboard boat motor.[4]

In its drive to control the energy market, Poseidon cooperated with other companies, such as Atomic Mining Services, and was openly hostile to organized labor. When Poseidon workers organized a walkout at Poseidon Energy Plant WV-06, supported by the Associated Miner's Union, the corporation called in the National Guard, which proceeded to gas the protesters using HalluciGen, Inc.'s riot control gas.[5]

Several Poseidon-owned companies were given lucrative defense contracts by the U.S. government. Some of Poseidon's most promising research projects never reached their final stages.[6] In the post-atomic world, technology scavengers like the Brotherhood of Steel and the Enclave still try in vain to decipher Poseidon's plans and either confiscate this technology or turn them into working models.[7] Conversely, Poseidon employees such as Karl Oslow left due to work dissatisfaction.[8] In Oslow's case, they became competitors themselves, founding competing company, Mass Fusion.[8]


  • Petró-Chico was "Un amigo de Poseidon Energy," a Mexico-based oil refinement and distribution company.
  • Poseidon Oil focused on petroleum extraction and processing, although it also invested in other energy resources, including nuclear power.
  • Poseidon Gasoline was Poseidon's division focusing on distributing gasoline and operating gas stations.



Poseidon Energy appears in Fallout, Fallout 2, Fallout 3, Fallout: New Vegas, Fallout 4, Fallout 76, and Fallout Shelter.

Behind the scenes

Behind the scenes
  • Poseidon was the Greek god of the sea as well as horses and earthquakes. His weapon and symbol is the trident. Poseidon's projects often used codenames drawn from Greek mythology.
  • The company's slogan, "Begin your Odyssey with us," is a reference to Homer's epic poem, the Odyssey. The tale follows Odysseus' journey home from Troy after being cursed by the god Poseidon.
  • Poseidon Energy as a parent company was planned to be introduced in Van Buren, Black Isle's canceled Fallout 3. In Fallout and Fallout 2, the company only appeared as Poseidon Gasoline and Poseidon Oil respectively. Joshua Sawyer introduced it as a pre-War organization in his Fallout RPG project in 2004, alongside a logo. It appeared in Fallout: New Vegas in 2010, a game developed under Sawyer's leadership, along with a modified version of the 2004 logo.
  • Van Buren would have also introduced other elements of Poseidon Energy: