Vault 3

Vault 3 is one of the Vault-Tec Vaults. The Vault is still completely intact in 2281, occupied by the Fiends, who killed the Vault's original occupants.

Location
It is located under a building in the South Vegas Ruins and is the base of operations for a gang known as the Fiends. Its location can be gained from the colonel at Camp McCarran after volunteering to help with the gang problem, from Elder Mcnamara of the Brotherhood of Steel during the quest Still in the Dark, from Diane during the quest Aba Daba Honeymoon, or from Private Ortega in the Barracks at NCR Sharecropper Farms.

Gaining Entrance
Use the Vault Door Control Pad to the left of the actual Vault door to get inside. The Courier can infiltrate the Vault by passing a speech check claiming to be delivering chems or by wearing a Great Khans outfit.

The Vault is extensive and filled with Fiends, but they will not attack the Courier as he goes through the Vault. Once the Courier reaches and kills his target, only nearby Fiends will attack and those in other areas will remain docile until a Fiend in their area is killed.

While it is possible to leave without killing all the Fiends, a large amount of good karma and XP can be earned by killing them. So if the Courier lacks the speech skill or Khan outfit for getting in peacefully, coming in guns blazing is a reasonable alternative.

Background
The original Vault 3 inhabitants opened their doors for the Fiends thinking they would be friendly. At this point the Fiends killed all the Vault dwellers inside and took over. It is not known if any of the original residents survived. The purpose of this Vault in the Vault Experiment was to stay shut and never open. It is suspected that the dwellers were having a mechanical breakdown due to the floods like every other Vault in the area (except Vault 21.) The breakdown probably pushed them to open up their door in hopes of finding help. Unfortunately for them, they found the Fiends instead.

Layout

 * Vault 3 consists of 3 areas: a Recreation Area, Living Quarters, and a Maintenance Wing.
 * Bryce Anders is located in a locked room in the Recreation Area which can only be accessed through the Living Quarters. You'll know you are at the right door as it's protected by a grenade bouquet and several floor mines. Use the Doctor's bag to heal his wounds. Ranger Anders will give you the maintenance key to help kill Motor-Runner. The terminal in the room with Anders will open a secret wall allowing access to the exit of Vault 3, though this should not be taken unless the player is certain he has looted the entire Vault.
 * Motor-Runner is sitting on his throne in the Maintenance Wing.
 * Fiend Daniel is located in the South end of the Living Quarters and also has a Maintenance key.

Notable Loot

 * A Chinese Army: Special Ops Training Manual in the Living Quarters center room, behind a locked door (average), on a shelf to the right. Also in this room: 3 magazines - Locksmith's Reader, Meeting People and Today's Physician - on a bedside nightstand.
 * A Chainsaw carried by Motor-Runner in the Maintenance Wing.
 * 3 magazines - Fixin' Things, Locksmith's Reader and Milsurp Review - in the Living Quarters' flooded area in the southwest. Also in this room: the two gun lockers mentioned on the Overseer's terminal.
 * On the bottom floor of the Atrium, behind a locked door (very easy), is a Nuka-Cola Quartz, a Nuka-Cola Victory, several Nuka-Colas, 24 Pool Cues and other minor loot.
 * A Locksmith's Reader in Maintenance Wing, behind a locked door (average) on the desk, and in the flooded section in the shelf.
 * A Today's Physician in the southern part of the Recreation Area's second floor, behind a locked door (hard).
 * The Reverse Pulse Cleaner for the Brotherhood of Steel quest Still in the Dark can be found in a locker inside Motor-Runner's throne room, on the 2nd floor.
 * In general, there are lots of chems, scrap metal and crafting materials everywhere in Vault 3.

Enemies

 * Fiends
 * Motor-Runner in the Vault 3 - Maintenance Wing

Appearances
Vault 3 appears in Fallout: New Vegas.

Images
Krypta 3 Убежище 3