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
Vault 111 was designed to test the long-term effects of suspended animation on unaware, human subjects, by placing them into cryo-pods. The staff were placed on short-term assignments to monitor the basic cardiopulmonary and cognitive functions of the residents. Long-term monitoring was handled remotely by Vault-Tec technicians.

Somewhere between 2077 and 2287, besides the murder of the Sole Survivor's partner; an unknown form of internal disaster occurred, leading to the deaths of all residents of the vault except for one, the Sole Survivor.

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.

Notable loot

 * Pip-Boy 3000 Mark IV - on skeletal remains of a Vault 111 scientist, right next to the Vault door

Appearances
Vault 111 only appears in Fallout 4.