Vault 101

Vault 101 is a Vault-Tec Vault located somewhere near the East Coast of the United States. Its role in the Vault Experiment was to never open for any reason, cutting off the Vault residents completely from the outside world. After the Great War, this Vault was sealed for 200 years, until one young Vault 101 Dweller suddenly found out that his father, the only family he had, suddenly disappeared from the Vault. The Vault 101 Dweller decided to emerge from his home and look for his father in the outside world.

Appearances
Vault 101 is going to appear in Fallout 3 as the Vault that the main character will come from.