Vault 111

Vault 111 is one of the vault series of fallout shelters developed by Vault-Tec. This vault is located near Sanctuary Hills, Massachusetts.

Background
Somewhere between 2077 and the 23rd century, an unknown form of internal disaster occurred, leading to the deaths of all residents of the vault except for one sole survivor.

In an August edition of GameInformer, it was stated that the experimental purpose of Vault 111 involved cryosleep pods. This information, while likely accurate, remains unconfirmed by official sources.

Layout
Unlike other vaults, the entrance to Vault 111 not only has an atypical pneumatic hull, but also acts as a hatch which gives way to an interior elevator. The inner door is seen to open first, followed by the hatch opening. While painted in the prelude, the vault door is seen to be characteristically rusted and dull after the Great War.

The interior layout of the vault itself is currently unknown. However, in the E3 2015 conference, it is partially seen when the Sole Survivor takes a Pip-Boy off of the corpse of a scientist in the vault's entrance hall, by the vault door.

Appearances
Vault 111 only appears in Fallout 4.