The Vault - Fallout Wiki

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The Vault - Fallout Wiki
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Vault 29
VB DD05 map Vault 29.png
Design doc map
Part ofVan BurenGametitle-VB.png Twin Mothers
FactionsVan BurenGametitle-VB.png Twin Mothers
Van BurenGametitle-VB.png Caesar's Legion
LeadersVan BurenGametitle-VB.png ZAX-29

Vault 29 is one of the Vaults constructed by the Vault-Tec Corporation. It is located on the West Coast.


Gametitle-VB.pngThe following is based on Van Buren and has not been confirmed by canon sources.

No one in this Vault was over the age of 15 when they entered. Parents were redirected to other Vaults on purpose. Harold is believed to have come from this Vault.[1]

This vault's experiment was devised by scientific genius Derek Greenway. Most of the parents were either "accidentally" redirected to other vaults or were in the early stages of health conditions that would no doubt cause them to die soon after entering the vault. Instead of a human controller, Vault 29 would have a ZAX super-computer. The ZAX would be programmed to raise children with the aid of robotic helpers, educate them in a primitive culture, and upon their reaching maturity, release them into a controlled environment. They would then be free to rebuild society from the ground up.

At one point Greenway explained his plans for Vault 29 to Diana, the human brain connected to a powerful computer, to see what her opinion would be. He was quite surprised when Diana was appalled at the idea. She said that, although the idea had merit, she found it to be morally objectionable on several levels. She recommended that the plan be scrapped. When Derek refused to do so, Diana took it upon herself to become involved with the project without his knowledge.

When the war started and civilization began to fall apart, Diana appropriated control of a satellite dish and aimed it at Vault 29. She then transmitted a series of security codes to the vault's ZAX unit, and gained control. Over the years that followed, Diana was able to see to the upbringing of the children, who founded the village of Twin Mothers on top of the vault, in her own nature-goddess religion. Every year she ordered a worker robot to leave the vault under the pretext of checking conditions outside. In reality they were preparing an area to receive the vault populace when they were ready to leave. Finally, she had a series of projectors installed at strategic locations, ready to project her chosen image. She was ready to play god.

By 2253, the vault itself has ceased working, but it's still a holy place to the inhabitants of Twin Mothers.

Harold emerged from Vault 29 in 2090.

Gametitle-VB.pngEnd of information based on Van Buren.


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According to early Van Buren leaks, Twin Mothers was Vault 31. It is unknown whether the number was changed, or whether the early leaks were simply a mistake.

There are some inconsistencies between the Fallout Bible description and the design document. While in both sources the vault initially was mostly populated by children, according to the Fallout Bible no one in this vault was over the age of 15 when they entered, and parents were redirected to other vaults on purpose, while according to the Twin Mothers design document, it was populated by older parents with infant children.


Vault 29 is mentioned in Fallout, Fallout 76,[2] and the Fallout Bible and was planned to appear in Van Buren.



  1. Fallout Bible 0 Vault system: "Vault 29 No one in this Vault was over the age of 15 when they entered. Parents were redirected to other Vaults on purpose. Harold is believed to have come from this Vault."
  2. Last Day of School