Vaults (bomb shelters) were created by Vault-tec, to protect certain people from TOTAL ATOMIC ANNIHILATION. However another purpose was to conduct experiments, on the residents of the vaults by the goverment.
NOTE: Vault 101 is not mentioned, due to it not having a scary background nor anything exciting. And Vault 77 due to it not being in the game.
Vaults Description
Vault 87 A Forced Evolutionary Virus (F.E.V.) research and testing facility. The residents were exposed to the FEV in locked chambers. Where scientists would observe their changes. In two weeks, the subjects underwent changes, that gave birth to super mutants and centaurs.
Vault 92 Populated largely by renowned musicians, this vault was a test bed for a white noise-based system, for implanting combat-oriented posthypnotic suggestions.
Vault 106 As an experiment, the overseer instructed the vault to be filled with colorless psychoactive drugs, into the air filtration system. Exactly 10 days after the door was sealed. The drugs caused hallucinations, which led to all of the vault residents' insanity.
Vault 108 The vault houses a cloning lab. All (surviving) residents are clones of one man called Gary.
Vault 112 All residents were placed in suspended animation, and connected to a virtual reality simulator, where they thought they would live a "perfect" virtual life indefinitely. Unfortunately, Dr. Stanislaus Braun held absolute control of the simulation, and used it to torture the residents for his own pleasure.