The massive population stems from, you guessed it, the residents of Vault 12. One of the biggest hubs of ghouls is Necropolis, a city players may run across in the original Fallout. Despite this, they’re often surprisingly empathetic characters, with thoughtful dialogue and a depth of experience taken from their horrifying life experiences. Zombie-like in appearance, their rotting flesh is a product of exposure to massive amounts of radiation. Ghouls are familiar to anyone who’s played a Fallout game. Awash in deadly radiation, the survivors of Vault 12 were permanently transformed by Vault-Tec’s negligence. Foregoing the very purpose of a fallout shelter, Vault-Tec intentionally left the door unsealed.

Vault 12 is one of the most twisted of these experiments.

Government, Vault-Tec built most of its vaults around “social experiments,” testing the effects of isolation and other variables in the tightly controlled underground communities.

Vault-Tec, the company who built the shelters spread across America, is a notoriously unethical corporation in the Fallout universe.

Fallout shelter online character