Fallout Wiki
Fallout Wiki

The nucleus of this research was the Dome, a huge stone facility that held the labs of every science known to man. It was a think tank where no problem could not be solved, where no question could not be answered.Doctor Mobius, Old World Blues intro

The Think Tank, also known as The Dome,[1] is a location in the Big MT in 2281. The building itself is in the shape of a dome, surrounded with bright upward-facing bluish-colored projectors. It contains the residence of the five Big MT scientists, as well as the former apartment of Dr. Mobius, known as the Sink.



Upon entry into a room with an elevator to the Sink, there is a hallway to the central dome. Inside the central dome, there are two sets of stairs on each side which lead to the rooms where the six scientists slept before they became think tanks.


Just outside of the Think Tank and in the front are two fenced-in areas, the one to the right houses what seems to be sensor arrays or some sort of radar towers. The one on the left, houses what looks like small silos, possibly holding water or other liquids inside. To the right, past the sensor arrays and down the pavement (and taking a right on the pavement, as if continuing on the path straight, there is a destroyed facility with no name, location or entrance), there is the X-12 research center, which is a small facility by a few large pipes. From here, following the path down (or north on the compass) is a number of lobotomites, whom, (depending on the player character's level) will wield various weapons. Farther along the path are three large radar towers fenced in to the right, along with two large buildings on the left with no real entrance; however, the second building down has a stairway up on its second floor, where several vending machines and metal boxes are located.

On the left, there is a large green metal pipe that leads to what appears to be a bridge, where one or more night stalkers can spawn along with several lobotomites. Farther down the pathway is a large intersection of pipes trailing towards different directions and two large satellite dishes. Next to the second satellite dish, several lobotomites will spawn, armed with various weaponry. Following the large red pipe down leads to the back area of the Think Tank, which holds what appears to be two grain silos, three barracks with pipes installed into them, and five smokestacks. There are various footlockers, electrical boxes, and metal boxes. Lobotomites have a chance to spawn here as well, next to the barracks.


Notable loot[]

  • Dr. Klein's glasses - After entering the Think Tank, to the left of a deluxe chemistry set, they will be next to it on the table.
  • Dr. Mobius' glasses - Located on the second floor of the Think Tank, in the easternmost room, just through the Average locked door, lying on some papers in front of the file cabinet.


  • Passing all of the skill checks will require Perception 8, Intelligence 9, Barter 90, Medicine 85, Science 100, Guns 75, and Speech 75. If at least three of the four quests associated with 0, Borous, Dala, and 8 are completed, the Medicine 85 or Science 100 checks are no longer needed.
  • There is a dead Followers doctor on the ledge surrounding the Think Tank's dome on the opposite side of the dome. There is a Followers doctor coat and a few stimpaks on the corpse. The corpse can be found by heading to the entrance and running up the ramp and then jumping for awhile to get there, and then going to the back.
  • The upgraded sonic emitter will work on the force fields around the Sink balcony, however, even with the force fields gone, there is still an invisible wall keeping the player character from jumping over the railing.


The Think Tank appears only in the Fallout: New Vegas add-on Old World Blues.

Behind the scenes[]

David Lieu created the tileset and handled the propping and lighting in the location.[2]