Vault 112 Vault 112 is one of the vault series of fallout shelters developed by Vault - Tec . It is located in the southwest part of the Capital Wasteland , underneath Smith Casey ' s garage , west of Evergreen Mills and south of the Charnel House . Background . Vault 112 was one of the last to be constructed . The construction started in November 2068 , and finished in June 2074 . It was intended for only 85 occupants , suspended in a virtual reality world for the indefinite duration of the vault ' s experiment . The vault was built to house and tend to the needs of its overseer , Dr . Stanislaus Braun , creator of the Garden of Eden Creation Kit . Within it , Braun installed a virtual reality simulator and cryogenics system , initially containing several simulated utopias , the last of which being the Tranquility Lane simulation . The system should have permitted a select few to live a ' perfect life ' virtually , if not practically , forever . What Vault 112 ' s occupants didn ' t know was that once they entered the virtual reality pods , Braun would exercise complete control over the simulation ; they had no means of leaving on their own . They became his playthings , completely at his mercy . Dr . Braun , after becoming bored of various simulated worlds , would proceed to virtually " kill " each one of them . Each time after killing them he would wipe their memory and resurrect them within the program . Location . The entrance to Vault 112 is inside Smith Casey ' s garage ; it has some mole rats and radroaches , but it ' s nothing that can ' t be dealt with . After proceeding past the counter and into the workshop , there is a large hatch in the ground just to the left ; it can be opened by activating a switch on the wall beside it . Below it is a short passage that leads up to the Vault 112 door . More mole rats can be found down here . Layout . Vault 112 houses an entrance area similar to all other vaults , which serves as the airlock and the only connection to the outside world . A single passage in the entryway leads down to the main hall . In it are twelve Tranquility lounger s arranged around a big pillar , each connected to a terminal which monitors the respective conditions of the " subjects " inside the loungers . There is also another Tranquility lounger , found in the overseer ' s office , located south of the main hall . The only medical unit of the vault is accessed east of the main hall ( where the loungers are ) . Since it can ' t be maintained by the human inhabitants as they ' re all in the Tranquility loungers , Vault 112 is instead maintained by a group of special caretaker robobrains . The robobrains are non - hostile ( even if one attacks them ) , and also lack combat inhibitors . When the player character enters the vault , they are told that their arrival is " 202 . 3 years behind schedule . " Due to the indefinite duration of the Vault 112 experiment , the vault uses geothermal power exclusively . This is provided by a Sure Power geothermal unit and backed up by an X - Tra Sure Power geothermal unit . The geothermal turbine level cannot be accessed . A Think Machine 3600r mainframe is housed in the main hall . As well as performing the functions of a normal vault computer system , it functions as the simulation control computer , running the main simulation program and synchronizing all the different Tranquility loungers . It appears linked to several smaller computers , one handling each lounger ' s graphics processing and its occupant ' s medical status . Because of it being maintained by robobrains , and being better hidden than many others , 112 is the only intact vault other than 101 in the Capital Wasteland . The outcome of this particular experiment is ambiguous . If Braun intended the simulator merely to satisfy his sadistic urges when he designed it , then it fulfilled its purpose completely . If , on the other hand , he sincerely intended to create a virtual haven for the residents to live eternally , the fact that his godlike position subsequently drove him insane and made the other residents ' existence an eternal hell would mean that the experiment was a failure . Appearances . Vault 112 appears only in " Fallout 3 " .