Fallout Wiki
Fallout Wiki

Gametitle-FO3 BS.png
Gametitle-FO3 BS.png

Enclave Squad Sigma is a special operations unit of Enclave soldiers stationed at the mobile base crawler in 2277. They are led by the Enclave Sigma Leader.


Sigma is composed of six Enclave soldiers. Their leader wears Hellfire power armor and wields an incinerator. During the Brotherhood of Steel's assault on Adams Air Force Base, Enclave Squad Sigma was assigned to defend the mobile base crawler.[Non-canon 1][Non-canon 2]

Daily schedule

They are initially stationed in their sleeping quarters above the entrance to the Enclave mobile platform but will proceed downstairs once the alarm is triggered to seek and destroy the Lone Wanderer. If they manage to hide from the soldiers, the squad will retire back to their quarters upstairs, except the leader, who wanders idly around the mobile base crawler area.

Interactions with the player character

Interactions overview

FO76 ui icon quest.png
This character is involved in quests.
Severed.finger colored.png
This character drops a finger when killed (Lawbringer).
Mesmetron icon.png
This character can be enslaved with the Mesmetron.


  • Who Dares Wins: Should the Lone Wanderer be spotted inside the Enclave mobile crawler, Enclave Squad Sigma will attack.



Enclave Squad Sigma appears only in the Fallout 3 add-on Broken Steel.




  1. Fallout 3 Official Game Guide Game of the Year Edition p. 44: "Enclave Sigma
    After the destruction of Raven Rock, the Enclave performed a mixture of tactical retreat and all-out flight, and their grip on the Capital Wasteland loosened severely. Now contending with malcontented soldiers, the remains of Enclave Camps dotted throughout the Wasteland with little or no contact or on-going tactical orders, and a lack of new recruits, the Enclave may be a doomed force. However, a small influx of specially trained fighters is seeking to fill the gap left by the Brotherhood of Steel's advances. Posted to previously unknown and highly secretive locations outside of the Capital Wasteland, only the most veteran of Enclave forces trained in multiple forms of combat earn the right to call themselves Sigma. These six-person squads feature a leader clad in Hellfire Armor and carrying an Incinerator, and each man in has seen numerous combat sorties and lived to tell about them. Sigma Squads are posted around locations deemed by Enclave high command as "imperative" to the salvation of the cause, so whenever you encounter Sigma Squads, you know something vital to the Enclave is close by."
    (Fallout 3 Official Game Guide faction profiles)
  2. Fallout: Wasteland Warfare Roleplaying Guide pg. 16: "The Army can also dispatch an elite black-ops unit, the deadly Sigma Squad, to deal with particularly dangerous threats."
Enclave Symbol (FO3).png