The residence area is the main living quarters of Vault-Tec's Secret Vault. It is the company's private Vault, where its members intended to survive the apocalypse and later re-enter the world having all the useful technologies at their disposal. When a conflict between the scientists and chief security officer Blake lead to a civil war inside the vault, a major explosion occurred consequently. This explosion separated the people into several groups. While the people who remain in the residence area feel quite comfortable compared to those who remain in other sections, they were first to die when the super mutants attacked.