One detail in Sanctuary Hills may point to a dark theory surrounding Vault-Tec while taking inspiration from a real-life location. Sanctuary Hills is the location players are first introduced to in a sequence set in the year that the bombs fell in 2077, being the home of the Sole Survivor and their families.
Sanctuary Hills homes are almost identical copies of the real-life Lustron Houses, which are prefabricated, enameled steel houses developed in the post-World War 2-era United States to accommodate returning war veterans, which ties in with the Sole Survivor's backstory as a war veteran. The real ones came in the colors "" "" "" and "" but Redditor Porkenfries notes that the ones in take mainly from the Surf Blue and Maize Yellow color palette, which resembles Vault-Tec's color palette.
Porkenfries then speculates that 's color palette for the houses is no mere coincidence, and with Vault 111 so close nearby, Vault-Tec may have run the community in secret, picking its test subjects for the vault earlier than anyone realized.
Vault-Tec didn’t have the best interests of the population in mind when it designed its Vaults, and these are ones you don’t want to live in.
With Vault 111 so close to Sanctuary Hills — the main entrance was literally within walking distance, with most of the wider facility likely situated directly under the small town — it's possible that Vault-Tec owns the entire lot of land, not just the vault beneath it. If so, the company would have been able to select its residents as they looked to purchase a home there, ensuring that when it did send its salesmen around to encourage them to sign up for the vault that all of its potential candidates were physically suitable for what came next.
As with all of Vault-Tec's vaults, there was an experiment that was far more sinister than the initial promise of shelter from nuclear fallout. Vault 111's experiment saw its residents cryogenically frozen, with an intent to monitor the effects of long-term
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