Vault 8 A Vault - Tec nuclear shelter , Vault 8 was a control vault located in western Nevada . It was designed to re - colonize the surface after 10 years . Background . Vault 8 was designed to house a thousand or so dwellers . It opened as intended after receiving the all - clear signal , and its residents emerged to begin rebuilding civilization . Vault City was the result . Years after its residents emerged , the shelter was used primarily as a medical center ( quite possibly the best one in the Wasteland , outside of the Enclave or the BoS ) for citizens , a power source ( although the nuclear power plant cannot sustain a large settlement indefinitely ) , an information hub ( Central Computer and its servers ) and a storage space for ore and other supplies essential to the well being of the city . Inhabitants of the city rarely ( if ever ) venture into the lower levels . Servants are tasked with keeping the vault clean , but they are unable to prevent deterioration - most of the vault door s are stuck and cannot be opened , while foreign items rattle in the air ducts . There is only one permanent inhabitant on the lower levels : Martin , a stuttering loner tasked with looking after the equipment in the Command Center . Layout . Level One . Beyond the massive outer blast doors and a long steel corridor lies a standard Seal ' N ' Safe Model 343 vault door , together with a typical airlock and security door . As in all vaults , a standard excursion locker is located on the wall , containing emergency supplies for those venturing outside . The vault ' s layout is quite typical , with the EML to the right of the entrance and the elevator hall to the left as well as the ventilation hub for the level . In " Fallout 2 " , the EML houses the city ' s premier medical facilities , including even cloning vats for replacement limbs and chemical synthesizers . It is manned by Doctor Troy , a fine physician , who can treat anything from crippled limbs through poisoning to radiation . He is a key figure in two quests , delivering a sample of jet to him and making an antidote for jet . Should the Chosen One become a Captain of the Guard , Marcus can be treated by Doctor Troy and all the ammunition stuck in his body removed . Assisting Doctor Troy is a young nurse , Phyllis ( originally called Nancy ) , who can provide some insight into how Vault City functions . Male characters can choose to date her , donate sperm to Vault City ( experience reward depends on their intelligence ) and convince her to see the outside world . Female characters can only do the latter , though . Someone lucky enough to possess the Magic 8 - ball can access the Emergency Medical dispenser in the hall , for a super stimpak and two regular stimpak s . Level Two . Standard design for living quarters before the war , Level Two is currently used only as storage . The rooms are filled with crates and abandoned equipment , though most doors have stuck power couplings or are locked . Vault City stores its supply of uranium ore for their nuclear power plant , as well as any other goods they trade with the outside . In an ironic twist , many crates contain 420 spare water chip s , originally intended for Vault 13 . To open the doors high strength is needed . Buffout and equipping a crowbar help a great deal . Exploration is worth it , as a great deal of valuable items can be found and the citizens don ' t seem to mind all that much . A small reward also waits for the repairman who opts to repair the rattling vent , as a microfusion cell has found its way inside . Level Three . The heart of the vault , the third level is home to its most vital facilities . This level is divided into two distinct halves by a red security door . For regular vault dwellers , the most important locations are the meeting room , where they can watch movies together or chat about vital shelter matters , followed by the library , where , on high resolution monochromatic screens , they can read all the great works stored in the databanks of the vault mainframe . Technicians , however , will be more interested in the computer core , located between the library and corridor leading to the elevator , where all the operations of the underground facility are monitored and vital functions controlled . At the intersection lies the vault ' s storeroom , where all the vault ' s basic supplies are kept in lockers . A well supplied storeroom is a sign of a healthy vault , even if it ' s not used anymore by its inhabitants . The second part , the actual command center , is separated by a security door with a bright red light , beyond which lies the security station with the vault ' s armory . Just beyond is the main control room , where the central computer , the primary control stations for the vault lie together with the water processing computer . Last is the Overseer ' s chamber , where his hydraulic pedestal and control seat lie and the vault ' s leader oversees its functions . In " Fallout 2 " only Martin , a stuttering man inhabits these halls , watching over the computers as ordered by the city authorities . To pass time , he sings to himself ( Maybe by The Ink Spots - the intro and credits theme of " Fallout " ) . The Chosen One can compliment him on his singing for a small karma bonus or deride him for the opposite .