Most of the Vault was subsequently filled with concrete, while the top floor was converted into a novelty hotel run by Sarah Weintraub. The Vault was taken over by Robert House after winning a game of blackjack where the wager was the entire Vault. The Vault was designed to study the evolution of a society where all conflict was resolved through pure chance, i.e. The Vault was abandoned by the time escaped convicts from the NCR Correctional Facility found it.

Subliminal messages were routinely sent over to each side, causing mistrust among the inhabitants. The groups lived in separate sections of the Vault and were governed by two overseers. The Vault was segregated into two groups, Red and Blue. Its inhabitants were taken prisoner and subsequently turned into super mutants. The Vault was raided by the Unity in 2155. Its residents emerged in 2097, eventually forming three raider groups: the Khans, Jackals, and Vipers, and Shady Sands, which would become the New California Republic. The Vault was intended to stay closed for 50 years and include people of radically diverse ideologies. The Vault Dweller emerged from here in 2161, in search of a replacement water chip for the Vault. The Vault was intended to stay closed for 200 years as a study of prolonged isolation, or until the Vault's residents were needed by the Enclave. This resulted in Necropolis and its large population of ghouls.

In order to study the effects of radiation on the selected population, the Vault door was designed not to close properly. However, they were merely congratulated for not killing anybody. The survivors decided to face the punishment of not selecting a person to sacrifice: death. Eventually, an overseer made the selection process random instead of a vote and a huge riot ensued. After the vault door was closed, it was revealed to the residents that they were required to sacrifice one person each year. This Vault was a social experiment testing human nature, most specifically the ability to sacrifice oneself for others, and the ability to place ideals above one's own life. Upon opening early after receiving the all-clear signal in 2079, the residents established Vault City with the help of their GECK. Ī control Vault that was intended to open and recolonize the surface after 10 years. All of the Vault's residents were massacred by a group of raiders known as the Fiends shortly after they opened the Vault door.

Sometime in the 23rd century, an unexpected water leak forced the Vault dwellers to open in hopes of trading with the outside. Ī control Vault that stayed closed due to the wishes of its inhabitants. The USA government commissioned Vault-Tec to build more than 100 Vaults across the country.

2 Additional installations using Vault-Tec technology.

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