Hidden Valley

Hidden Valley is in a fenced-in area nestled between hills and rocks roughly northeast of the NCR Correctional Facility (NCRCF) and southeast of Sloan. The valley is home to numerous bark scorpions and remnants of the Mojave chapter of the Brotherhood of Steel that once occupied HELIOS One before being defeated by the NCR during Operation: Sunburst.

Background
Hidden Valley is a complex of USAF bunkers remaining from before the Great War near the heart of the valley. Abandoned even before the war, the area around the bunkers is littered with junk. Signs on the roads and peaks leading into the valley mark the boundaries of the complex. Stretches of drooping pre-War wire fences also note the area as being USAF restricted. Prospectors who have returned from Hidden Valley have reported four bunkers, each with an intercom system, but complete silence in response to any calls on the intercoms. Furthermore, prospectors have reported an eerie feeling upon entering the complex. Others tell of seeing armored figures exiting the Valley from within a raging sandstorm that seems to arrive every evening and stay for the night.


 * Transcripts from the Hidden Valley bunker terminal:



Layout
Hidden Valley can be accessed via the road near Sloan and at the northwest and southeast corners where the fence is down. There are also small side-paths, at least one of which is heavily inhabited by bark scorpions and the occasional giant radscorpion when going in the direction of scorpion gulch nearby. A hollowed-out rock with a heart and anti-bomb symbol painted on it will be directly in front of the player character when fast-traveling to Hidden Valley.

Inside the fenced area, four bunkers are spread around the perimeter of the area. Three of the four bunkers are just a large entry room with a locked door on the opposite side that leads to nowhere, but may contain some notable loot.

Buildings
The entry room has two skeletons on a sleeping mat with a bottle of wine and a suitcase, which suggests a sad story. There is also a campfire. The locked (Easy) door in this bunker hides a hundred 5mm rounds and anywhere between twenty and twenty-four 5.56mm rounds.
 * East bunker

At the end of the room behind the locked door (Average) is a pair of mini nukes, a stimpak and some 5.56mm rounds.
 * North bunker

There are two disarmable grenade bouquets in the entrance hallway hanging from the ceiling, and a third out of reach near the middle of the entry room. The entry room also contains a sleeping pad and a sack, along with a journal indicating that someone is using the bunker as a safe house. The locked (Hard) door here opens the way to three ammunition boxes, a mini nuke hidden under a tin plate, a steam gauge assembly and two pieces of scrap metal on the right, and some frag grenades and 5.56mm rounds on the left.
 * South bunker

If the Courier entered the west bunker (below) without Veronica as a companion, they will be assigned a task to remove an NCR ranger from this bunker. After dealing with the ranger OR making contact using Veronica OR answering the summons for ED-E, a trip-wire triggering the grenade bouquets will appear in the entry room door, along with more entry room grenade bouquets (one to the left is disarmable). The entrance hall grenade bouquets previously mentioned will also respawn if disarmed earlier.

The fourth bunker, also known as Hidden Valley bunker, is the home of the Brotherhood of Steel. The bunker is marked by a small broken tree stump directly on top of the dome. It is not possible to gain access to the bunker without acquiring the holotape containing the passphrase from either the two dead Brotherhood of Steel paladins at the REPCONN headquarters, the dead Brotherhood soldier near Black Mountain, or the two dead Brotherhood soldiers in a ditch on the artillery-battered area outside Nellis Air Force Base.
 * West bunker

With the holotape and passphrase, an option will be given to say it into the intercom. Otherwise the lock (Very Hard) can be picked. Alternatively, the door can be opened with Veronica present. Access can also be granted through the quest Wild Card: Side Bets or by advancing far enough in any storyline to be asked to interact with the Brotherhood of Steel.

Unmarked quests

 * Brotherhood Bond
 * Hidden Valley computer virus
 * Pistol Packing

Appearances
Hidden Valley appears only in Fallout: New Vegas.