Retrieve Parts / Gain Access to Vault 15 Retrieve Parts / Gain Access to Vault 15 is a quest in " Fallout 2 " . Background . The New California Republic needs some pre - War computer parts from Vault 15 , from where they originated . However , some squatters have moved into the area directly over the vault and set up a small shanty town . For some reason they rejected any diplomatic talks with the NCR and denied them access to the vault , eventually , some of the republic ' s representatives stopped returning . President Tandi is looking for a specialist who can get the computer parts for the NCR , and possibly negotiate terms for the vault and the town above it to join the republic . Walkthrough . If the Chosen One speaks with Deputy Karl ( located in the Police Station in Downtown NCR ) about work opportunities he suggests getting an audience with President Tandi at the Hall of Congress , and that she is " looking for someone . . . resourceful . " Tandi offers the Chosen One $ 500 for retrieving the needed computer parts from the ruins of Vault 15 . This conversation is also an opportunity to find out more about the canon events of the Vault Dweller ' s adventures in Shady Sands as well as the present NCR , including getting the NCR history holodisk . Once you travel to Vault 15 you will find out that the squatters are not very friendly . You can get access to the vault by either completing the Rescue Chrissy quest and gaining their trust or by simply killing their leader , Zeke , and looting the key - card from his body . If you rescue Chrissy you will discover that the people living in the vault are actually a group of raiders , known as the New Khans , led by Darion . He and his men are seeking revenge on Tandi and using squatters as cover . Vault 15 itself is to be accessed through an elevator door in the side of the rock wall just left of the building Chrissy was being held in ( the main entrance in Zeke ' s house cannot be used , as he explains ) . Players may have missed the elevator on their first visit due to scattered trees and a coat of dust camouflaging the door . The computer parts will be on the 3rd floor in the 2nd room to the right with the lockers lining the walls . At this point you can return to Tandi and get the award . But to also get much more XP , loot and a good ending for both the NCR and the squatters you will have to kill Darion and persuade Zeke to let the vault be annexed by NCR . To turn in this quest , it ' s enough to " either " get the parts or complete the deal . If you weren ' t mercantile when negotiating the job , Tandi would award you with $ 6000 instead of just $ 500 . If you discovered Vault 13 before you return to her you have the option to tell her about your discovery . She will refuse to believe your story of talking deathclaws though and tell you to stop wasting her time . If however the deathclaws in Vault 13 are already dead , you can inform Tandi for a further bonus , but you must have visited and seen the playback . This amounts to $ 10000 no less ( $ 20000 if you haggle with her ; she ' ll be angry but pay up . Surprisingly , there ' s no penalty here ) . Now , all that leaves is see Gunther to get the reward . Once this quest is completed Tandi will not talk to you anymore .