Standing on the metal grate to enter the bunker, directly to the east-south-east, is a hollowed-out rock containing random loot. If Dead Money is not installed, the grate will always be locked, cannot be picked, and the key to it doesn't exist in the game. However, in certain versions of the game prior to any patches, the grate will open.
The bunker interior is simple - the entrance contains a set of stairs leading to a main corridor from which two rooms can be accessed. There are several Sierra Madre Casino posters on the wall, and the graffiti at the entrance reads "Gone to Sierra Madre" and "I left my ♥ in Sierra Madre." There is a headless male corpse with some minor loot in the first room. This corpse is an immovable container, not a body, so although it appears to wear a Dead Money jumpsuit, one cannot be taken from it.
At the bottom of the stairs is a door. When the Courier attempts to open the door, a warning appears about Dead Money. Opening the door does not immediately start the add-on, allowing one to continue to explore the bunker. To the right after opening this door is a hallway that has been collapsed in rubble and is inaccessible.
The corridor to the left after the stairs leads to a locked door, which can be unlocked by hacking the Average terminal found nearby. Once the door has been unlocked, a Sierra Madre vending machine will be found. The room also contains both a reloading and work bench, numerous crafting items (notably scrap metal, scrap electronics, and sensor modules), several bottles of Scotch, Elijah's chemistry set (which offers a Jar of cloud residue every 24 hours), a laser rifle, a combat knife, a T-45d power helmet, and a Dean's Electronics skill book. The footlocker at the base of the bed (containing Father Elijah's robes) and the terminal on the desk cannot be accessed until after the completion of the add-on. Along one of the walls, someone has scribbled a series of mathematical formulas on a large blackboard.
A "drop box" (smaller version of a wall safe) can be found across from the wall-mounted terminal just outside the room. Every time upon entering the bunker again after being away for 3 days or so, there will be Sierra Madre chips and a complimentary voucher inside the drop box. If the player won 7,500 chips in the Sierra Madre Casino, the voucher will be exchangeable for 1000 chips at the Sierra Madre vending machine. The length of time passed will account for how many chips and vouchers there will be in the drop box.
The room ahead consists of several bunk beds attached to the walls on both the left and right hand side, underneath each bed is a footlocker. Situated in the center of the room is a table adorned with an active radio playing the Sierra Madre Broadcast on an infinite loop. Walking into this room begins the add-on.
Once Dead Money is completed, 100 Sierra Madre chips and a complimentary voucher worth 1000 free chips will be inside the drop box. An additional 100 chips and another voucher will be automatically deposited into the drop box every three days. There is also a vending machine in Elijah's room, which dispenses items the player has gotten the codes for, such as stimpaks, doctor's bag, weapon repair kits and other items. Items such as cartons of cigarettes and pre-War clothes can also be exchanged for additional chips.
The terminal on the wall will become unusable after the completion of the add-on.
It appears that storage in the Bunker does not reset, thus making the bunker an ideal location for player living, with ample storage, a reloading bench, a workbench, quick access via fast travel, and unlimited access to Sierra Madre Chips and the Vending machine. There is, however, no water, if playing in hardcore.
It is worth noting that all equipment with the exception of quest items will be taken away, and returned upon completion of the add-on.
Before the cinematic where the player character falls unconscious, if the view is quickly changed from 1st person view to 3rd person view and see that there's actually a metallic door under the bunker used to transport the player to Dead Money..
On the set of stairs inside the bunker, there is graffiti that says "Seera Madre" instead of "Sierra Madre".
When looking at the local map in bunker it shows Villa entrance. This is because there is a door leading to the villa directly under the bunker.
Before and after the completion of Dead Money there is an audible radio noise in the first room (with the corpse and the graffiti).
After the player has left the Sierra Madre, it is possible to Noclip under the floor in the room with the radio on the table. Under the floor is a door which allows players to enter back into the Sierra Madre. (PC Only)
xbox360ps3pc The bunker's exit hatch may say that a key is required to exit back to the Mojave Wasteland (thus becoming a prison), even after completing Dead Money. The solution to this is removing the system cache from your hard drive then starting up the game. Once it gives you the choice to update, click cancel and continue on from there. Load up your saved game and you will be able to exit the bunker back to the Mojave Wasteland. Once you re-update you will not be able to enter since a key is still required, hence you will permanently be locked out. [verified]
ps3 (may be due to lasted update) everything in the abandoned BoS bunker or any items from Dead Money are no where to be found, including stationary objects found like the old fashioned radio, Elijah's bed/vending machine, or obtained items like the automatic rifle and police pistol. This was caused by the localization of DLC, as a person in Canada Needs French/English Canadian version, and with the pre-order DLC packs, the French version is required. [verified]
xbox360 When the DLC is not installed, companions will sometimes fall out of the game upon entering the bunker. [verified]
xbox360 Sometimes when saving while directly in front of the door that questions you about whether you want to start the DLC, loading that save will not load the door and instead have a gaping hole after it. [verified]
In case the bunker's entrance is locked, getting to the recommended level of 20 and having Veronica as a companion may cause it to unlock. [platforms tag needed][verification needed]