Big MT

Big MT, also known as the Big MT Research Facility or Big Empty, was a pre-War scientific research center and defense contractor located south of Hopeville  The facility and surrounding area serves as the game world for the Fallout: New Vegas add-on Old World Blues.

Background
Big MT was a scientific research center intended to "create a new world, fueled by technology, for the benefit of all mankind." It attracted the "the brightest minds of the 21st century" to solve the technological challenges and in the process, succeeded in discoveries related to sonic emitters, space age alloys, DNA hybridization, force field particle research, and Auto-Doc advances in cranial, cardiac, and trauma surgery.

The facility was located under a mountain, where the stone building held laboratories of every type of scientific study. A concentration camp was built to detain "Communist infiltrators" and Chinese citizens and use them as research subjects, creating and utilizing total pacification collars to control them. After the Great War, the company's facilities were damaged, exposing the building's dome within a crater. The Y-0 research center was also damaged in an explosion, and an event referred to as the Great Static caused additional damage to the facility. Elijah described it as a "treasure box" and a "scientific graveyard of Old World misery," including technology such as Saturnite alloy, holograms, hibernation chambers, Holorifles, bomb collars, and Securitrons. The location inhibited travel, as Legion explorers reported the Big MT may as well have been "a wall to any living thing approaching it."

Pre-War executives inhabit the facility, having been transformed into robotic Think Tanks. These robots attempt to capture and lobotomize some who approach the facility, utilizing a pacification field to keep both Lobotomites and creatures within the facility from leaving. Visitors who are not lobotomized, such as Christine Royce, Elijah, and Ulysses, fought through hostile inhabitants, and the latter two were able to speak with the Think Tank.

Layout
Big MT is dominated by the central dome, the the Think Tank, which is connected to outlying facilities by numerous walkways, pipes, and conduits.

To the north lies the rail line that passes into Big MT via the Big MT north tunnel before splitting into two lines that run toward the east and west tunnels. Near the north tunnel is the X-42 robo-warfare facility, an important facility even with a dome; later known as the "Forbidden Zone" of Doctor Mobius. Other facilities include the Signal Hills transmitter, the Saturnite alloy research facility, the X-22 botanical garden, and the X-17 meteorological station. Just north of the western train tunnel is the Little Yangtze concentration camp and the construction site.

To the east, along the eastern railway, several facilities are located including the X-8 research center, the X-7b "Boom Town" target zone, the Securitron de-construction plant, the hazmat testing ground, and the waste disintegration platform.

The X-66 Hexcrete archipelago is on the western portion of the crater. Among the hexcrete structures are several facilities, including the X-13 testing facility, the Z-43 innovative toxins plant, the Z-38 lightwave dynamics research building, and the X-7a "Left Field" artillery launch. In the southern portion of the crater is Higgs Village, which contains the former homes of the Think Tank. It is flanked by the X-12 research center and Y-17 medical facility.

Appearances
Big MT appears

Behind the scenes
Big Empty or Big Mt was originally conceptualized for Van Buren and described by Chris Avellone during Van Buren's pre-production as a military boot camp, still manned by training robots. . In later development it was merged with the Leavenworth Prison into the Tibbets Prison facility. Tibbets is referred to the Big Empty in design documents.