Bounty Killer Bounty Killer is an in " " . Detailed walkthrough . This unmarked quest is " obtained " from Colonel Hsu , the leader of the NCR ' s main base , Camp McCarran . No prior interaction with McCarran is required for the Colonel to mention that the Fiends of New Vegas are causing a lot of trouble for the NCR , and this can occur by simply trying all the speech paths possible when talking to Hsu , as long as the player is not an enemy of the NCR . Once Hsu mentions Motor - Runner ( who can also be mentioned by Major Dhatri ) as well as a Ranger who went missing , you can go to Vault 3 to continue the quest . Going to Vault 3 goes very well in conjunction with the Brotherhood of Steel quest Still in the Dark , as one of the parts for the air filtration system is located in the Vault . Also , the Great Khans quest Aba Daba Honeymoon requires you to deliver some jet and psycho to Motor - Runner in Vault 3 . At Vault 3 , which is located in Fiend territory to the west of Camp McCarran ( and may be marked on the player ' s map by either Dhatri , the Brotherhood of Steel , or the Great Khans ) , the player has two options upon entering . The first is to fight your way through the fiends ' main headquarters , which is not an easy feat considering that Motor - Runner is well protected by a vault - full of fiends armed with s and other heavy weapons . The second , more diplomatic action is to pass a speech check of 64 with a female fiend at the Vault door to convince her you are a Khan selling chems or simply put on Great Khans clothes and you can then enter peacefully . After passing through the main area of the Vault , turn left and continue following signs until you reach the door marked " Living Quarters . " Immediately upon entering the living quarters , take the first left down a hallway and open the last door . This should reveal a dead fiend ( apparently killed by a booby trap ) and a hallway with a mine and a tripwire to a grenade booby trap with one last mine at the top of the stairs . The player must go through this hallway to reach the missing ranger . Through the door is a hidden area of the entrance hall to the Vault , in which the missing ranger Bryce Anders is hiding . He will say he just needs more time to kill Motor - Runner and that you should leave . From here the player has several options : If Anders is convinced to leave and healed by the bag he will open a passage from the room he was in directly to the Vault 3 entrance chamber and sneak out of the Vault . This allows you to go directly from talking to him to the Maintenance Room of the Vault , which is relatively easy to find ( just follow where the heavy troops are ) and is where Motor - Runner is located . There are several ways to kill Motor - Runner : Basically , if you passed the speech check at the beginning you should send the Ranger on his way and kill Motor - Runner yourself with no resistance from the fiends , and if you are fighting your way through you should take the Ranger with you to fight your way through the vault and kill Motor - Runner . The latter grants a slight bit more XP ( 52 XP as opposed to 50 XP for doing it by yourself ) . If you retrieve Motor - Runner ' s helmet and deliver it to Colonel Hsu , he will grant you NCR fame as well as caps . Quest stages . None , this is an unmarked quest .