Vault 112 in Fallout 3 is one of the few Vault-Tec facilities that are still active in the game’s post-apocalyptic wasteland. That said, its residents aren’t exactly “living” as they normally would. This is because of Vault-Tec’s intended experiments on the residents of Vault 112.
Vault 112 can be accessed through a Fallout 3 location labeled Smith Casey’s Garage. It’s found southeast of Little Lamplight and west of Evergreen Mills. Though the garage may seem normal at first, flipping a switch will reveal a staircase descending into the ground.
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According to information from Fallout 3, Vault-Tec began construction on Vault 112 in 2068 and finished in 2074. It was built to house 85 occupants for an indefinite amount of time. Interestingly enough, only one administrator was assigned to the entire vault — Overseer Stanislaus Braun. A skilled scientist, Braun was known for single-handedly developing the Garden of Eden Creation Kit (G.E.C.K.). After which, he started dabbling in virtual reality programs.
Braun was also the Director of Vault-Tec’s Societal Preservation Program. Thus, he had free reign to design experiments for individual vaults, likely including the known vaults in Fallout 3. It was his interest in virtual reality was ultimately what spurred the creation of Vault 112. The vault was outfitted with geothermal energy sources, caretaker robots, and special stasis pods. The pods would be able to sustain the residents of Vault 112 while also tracking their stress levels and vital signs.
Meanwhile, Braun worked on multiple simulations — virtual utopias where the vault residents could forever live in tranquility. By the time the Great War began,
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