Fallout: 10 Most Evil Companies 

10. Vault-Tec Corporation

With global resources nearly depleted and war seeming inevitable in the mid-2050's, America decided to invest hundreds of billions of dollars from their already devastated economy to build about a hundred underground nuclear fallout shelters known as Vaults.

They commissioned Vault-Tec Corporation to construct these vaults but as a decade went by and there were still no nukes flying, the American government started to see that the only good things they were getting out of these expensive underground facilities were the insane new technologies developed there.

As time went on, more and more vaults shifted their focus away from keeping people safe in the event of a nuclear attack and more towards testing the inhabitants and using them for twisted experiments with new technology.

Your character's vault, Vault 111 from Fallout 4 was designed to test the effects of long-term cryogenic suspended animation, other vaults had other experiments such as playing constant white noise to implant subliminal messages or not including enough food simply to see what the residents would do.

In all of these experiments the participants were nonconsenting and unaware and, for some reason most tests continued even after the bombs fell.