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Fallout Wiki


Gecko's nuclear power plant, also known as Poseidon Oil Reactor #5,[1] is a large nuclear power plant.


Entry area

Once the Chosen One enters the plant, they are greeted by a guard at the reception area. Jeremy is in the supply room on the player character's left, and the entire section is the living spaces for the ghouls, mainly Gecko's glowing ones. Separating this area from the rest of the complex is a checkpoint requiring a yellow pass key to pass.

Yellow area

This section requires the yellow pass key to gain access and contains the plant's control center, more living areas, including those of Festus, the reactor foreman. He can be pickpocketed for a part requisition form and a red pass key can be found in a locker in the first room on the left after entering the yellow area.

Reactor core

This section requires the red pass key to gain access. Hank watches over the control room of the reactor from this point, which also contains a computer with the controls for the maintenance robot, and a link to PoseidoNet, which provides the Chosen One access to an Enclave security station on the Enclave Oil Rig. The player character can install the needed part by hand or with the robot or overload the reactor manually. Radiation levels inside the core are very high.

Notable loot


Gecko's nuclear power plant appears only in Fallout 2.

Behind the scenes

  • One of the glowing ones in the reactor will point his finger to the Chosen One and say 'Phone home', a reference to the movie E.T.
  • With 50% Science, during the one-way video conversation with the Enclave communications officer, if the Chosen One responds "Uh, it's working just fine. I can see you," they can also say "Uh, we're all fine here. How are you?" This is a reference to the 1977 film Star Wars IV: A New Hope, where Han Solo tries to deceive an Imperial intercom officer after commandeering a communication station.



  1. Reactor Maintenance terminal: "{140}{}{This terminal is used to input command data for the robotic maintenance and repair unit assignedtoIn-game spelling Poseidon Oil'ReactorIn-game spelling #5. This terminal also allows access to PoseidoNet.}"
    (Reactor Maintenance terminal's transcript)