Vault 51

Vault 51 is a Vault-Tec vault located in the Forest region of Appalachia in 2102.

Background
As with the other vaults, Vault 51 was sealed shut during the Great War in 2077. Twenty-five years later in 2102, the vault remains sealed.

Vault 51 contained a ZAX unit that turned on the Vault's Overseer.

Vault 51 was run by a ZAX unit, with the experiment testing tribalism and the ZAX unit turning the vault dwellers against each other.

The holotapes AUTOMATED RECORD 0000001 and AUTOMATED RECORD 0000002 are speculated to have been recorded by an escapee of Vault 51 and the "bucket of bolts" is in reference to ZAX.

Appearances
Vault 51 appears only in Fallout 76.