|The following is based on Fallout: Brotherhood of Steel and has not been confirmed by canon sources.|
The Facilities is a location inside Vault-Tec's Secret Vault, which is the company's private Vault, where its members intended to surive the apocalypse and later enter the world having all the useful technologies possible. The facilities were the location where the all maintenance work took place. It also serve as the warehouse, the robot station and central computer system.
The facilities include three levels and CALIX' mainframe. When the Initiate come to this place, it was infested with malfunctioning, dangerous security robots and laser grids. The Initiate succeeded in entering the mainframe, where he battled several nightkin, stationed here to guard the place. He used the mainframe to shut down auxiliary vent and give the people from the garden hope to escape the Vault.
- Plasma rifle - after returning from the Ruins
The Secret Vault's Facilities appears only in Fallout: Brotherhood of Steel.