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This is an overview article which contains background information and cross-game comparisons. For game-specific information and stats, see the articles linked on the right.
Gameplay articles
Fallout 2Robobrain
Fallout TacticsHumanoid brain bot
Fallout 3Robobrain
U.S. Army robobrain
Outcast robobrain
Enclave robobrain
Brotherhood robobrain Icon cut
Robobrain sentry Gametitle-FO3 PL
Fallout: New VegasRobobrain
Think tank Gametitle-FNV OWB
X-8 robobrain Gametitle-FNV OWB
Robobrain Mark series Gametitle-FNV OWB
U.S. Army robobrain
Servomech robobrain
Integrated robobrain
Cybermech robobrain
Quantum robobrain
Fallout 76Robobrain
Robobrain sentry
Robobrain tactician
Robobrain war mind
Robobrain devastator
Van BurenRobobrain
Think tank
S.O.R.-1000 Alpha
Gametitle-FO1Gametitle-FO2Gametitle-FO3Gametitle-FO3 PLGametitle-FNVGametitle-FNV OWB
Gametitle-FO1Gametitle-FO2Gametitle-FO3Gametitle-FO3 PLGametitle-FNVGametitle-FNV OWBGametitle-FO4 AUTGametitle-FO4 FHGametitle-FO76Gametitle-FOTGametitle-VBGametitle-FB
I calculate your chance of success to be...well, I don't want to be morbid...

The robobrain is a next-generation cyborg appearing throughout the Fallout series. Developed by General Atomics International with the assistance of RobCo Industries,[1] the robobrain was designed from the ground up as a multirole platform for use by military and civilian clients. They are more flexible and powerful than robots due to the fact that their central control and processing unit is an actual brain, rather than an artificial facsimile.[2][3] Coupled with a robust, all-terrain tracked chassis and powerful armaments, the robobrain was on the forefront of a new revolution in combat robotics.


The robobrain, constructed by General Atomics International before the great nuclear war, is unique in that it uses an actual organic brain as its central processor.Loading screen

Robobrains were created before the Great War by General Atomics International both for the U.S. military and for the civilian sector. Official government records list only chimpanzee brains as being used in the robots,[4] but at least some human brains were taken from the bodies of executed criminals.[5] Many of these criminals were insane, so the resulting robobrains also tended to be unstable, despite complete reprogramming[6] via the CODE technology. Some of these human-robobrains hybrids would try to kill themselves, apparently resenting being made into cyborgs. Rarely, some used the robobrain technology as a means of life extension. They underwent the procedure willingly and were not mind wiped. Bert Riggs, a lead developer of the robobrain project, lived hundreds of years beyond the war this way.



A robobrain moves on a tracked chassis (using dual 40 hydro-processor motors), either on a fixed or flexible mount. This is attached to a sizable cylindrical torso with a reinforced glass dome on top, housing the central processing unit with the organic brain suspended inside. In addition, to use consoles, operate levers, or engage targets with weapons, they have two flexible manipulators, ending in three point claws, on the sides of their torsos.

Robobrains were going to be the next generation of robotic soldiers in the war against China, but their production costs made it difficult to implement their introduction into the American military.

The robobrain's organic brain is suspended in pressurized bio med gel (which is the primary reason the brains can continue to function for several centuries). Any damage to the casing or the brain itself can disrupt the robot's brainwaves and damage its neural connection to the rest of the body, affecting the robot's performance. Feeding the organic brain information about its surroundings are special sensors (typically with software written in 2076 installed), called Sensors '76.[7] Apart from providing a real-time high-resolution feed of the robot's surroundings, they are also capable of switching to infrared mode, in case the main sensors, for one reason or another, become useless for operating in unlighted areas.

The manipulators in some robobrain models are designed to operate regular human weaponry (such as AK-112 assault rifles), while some others have integrated laser guns (wattage equivalent to AEP7 laser pistols), supported by integrated mesmetrons. In addition, all robobrains have a built-in voice synthesizer.


Robobrains, due to the nature of their organic processor, can be programmed with much more complex and expansive instructions than typical robots. This also means they are superior to typical combat robots in the Fallout universe, at least in terms of their tactics and strategy. Military maintenance bots can be controlled via a WLAN matrix network. In this case, a central AI operates the robots. In the Mariposa Military Base, the programs used to run robobrains were Facility Maintenance v2.1, Movement v4.8b, Repair v0.8a, Pest Control v1.4, Hearts v1.0, and Sensors '76.

However, it is imperative that robobrains be routinely memory-wiped, as it is possible for the brain to break its own programming (CODE or other types) and develop serious personality quirks. In Fallout 3 many suffer from this fate and seem to have grown to dislike what they were programmed for, but at the same time can do nothing to stop themselves from carrying out their programmed orders. This is hinted at by their battle cries of (but not limited to) "Please don't take this personally," "They could have programmed me to love, to forgive, but nnnoooo," and "When this is all over, I hope we can still be friends." However, some seem to enjoy what they have been programmed to do, with disturbing remarks such as, "Don't be afraid, I've become quite good at killing."

Robobrains in the Capital Wasteland have a noticeably feminine personality, in both voice tone and speech, however, this could be a result of their reprogramming. A special, brainless robobrain called Masterbrain can be found in the Vault-Tec headquarters in the ruins of Washington, DC. There are also non-hostile, essential robobrains in Vault 112. It is also notable that the Brotherhood Outcasts have painted and reprogrammed several robobrains for their own use.




Robobrains in California and neighboring states do not possess integrated weapon systems inside their frame. Rather, their flexible arms and organic processors were tailored to use regular firearms (such as rifles) in combat, something they are able to do with disturbing efficiency. Robobrains could be found in hi-tech locations such as Mariposa Military Base, the Glow, Sierra Army Depot and in the NCR.

Mini-FOT LogoThe following is based on Fallout Tactics and some details might contradict canon.

Humanoid brain bot

Barnaky Bot FoT
Gameplay article: Fallout Tactics

The humanoid brain bot's brain is held inside of a hardened glass container at the top and suspended in pressurized bio med gel. This bot is equipped with a cannon on its left arm that is a combination of a .50 machine gun and a missile launcher, as well as a large claw on its right arm for close combat, and is able to communicate verbally. The humanoid robotic suit is extremely resistant against almost any type of damage.

Mini-FOT LogoEnd of information based on Fallout Tactics.

Think tank

Gameplay articles: Fallout: New Vegas, Van Buren

A think tank is a special type of brain bot. It consists of a robotic sphere-shaped body housing a human brain with three monitors attached to the robot's chassis. Two of these monitors depict eyes and the other depicts a mouth. Like eyebots, think tanks levitate by means of an unknown propulsion system.

Notable robobrains


  • It's not entirely clear how robobrains can see, as they have no visible optical sensors or other sensory input devices. However, in the Fallout 4 add-on Automatron and Fallout 76, the robobrains have a single eye inside the glass dome.
  • Herbert "Daring" Dashwood has a bit of a fascination with the robobrain, and has often wondered what goes into making one. He mentions that he likes their "sexy voice." It is unknown whether it indicates that the brain itself is that of a woman, or if its voice synthesizer is simply programmed to sound female. He also was exposed to a robobrain's mind blast once, and wrote later in his journals that he had a headache "for a week afterwards." This is reflected in game, as a mind blast from a robobrain is almost guaranteed to cripple the head.
  • Splicing a lobotomite and a robot at the X-8 research center will yield a robobrain. It humorously aspires life in the outside world only to malfunction and self-destruct in a tiny explosion.
  • Aiming for the robobrain's "head" is the easiest method to destroy them, as guns are much less effective on their armored torso than the glass dome containing their brain.
  • The brain appears to be much larger than a human brain. This could be due to the brain being suspended in fluid with very little restraint, causing it to decompress.

Notable quotes

Robobrains have humorous yet quite morbid dialogue programming. They strongly hint that while the brain has feelings for all forms of life, the robot programming makes it kill involuntarily.

  • "You could run? I'm trying to kill you, you know."
  • "Please believe me when I say I'm not enjoying this."
  • "I calculate your chance of success to be...well, I don't want to be morbid..."
  • "I'm not programmed to fail, just so you know..."
  • "They could have programmed me to love, to forgive; but noooooo."
  • "Please come back. I'm sorry about all that recent unpleasantness."
  • "I'm sorry, but my programming requires that I keep on trying to kill you!"
  • "Which do you like better? The psionic beam or the laser?"
  • "I hope we can still be friends when this is all over."
  • "I'll miss you."
  • "You may want to run now."
  • "Are you still there?"
  • "Why are you hiding? I will find you."
  • "Oh well. I wished you hadn't left so soon. I was having such a good time with you."
  • "I'll miss you. Please come back and see me again."
  • "I'm sorry, but you've forced me to utilize deadly force."
  • "I'm afraid I'm a very lethal killing machine."
  • "There's no point in trying to hide from me. I'm programmed to be quite relentless."
  • "Oh well. Maybe next time you'll introduce yourself."
  • "Threat detected! Kill! Kill! Kill!"



  1. RobCo sales & service center acts as cover for the research below.
  2. Fallout: New Vegas loading screen hints: "The Robobrain, constructed by General Atomics International before the great nuclear war, is unique in that it uses an actual organic brain as its central processor."
  3. Automatron loading screen hints: "The Robobrain, constructed by General Atomics International before the Great War, is unique in that it uses an actual organic brain as its central processor."
  4. Fallout 2 Official Strategies & Secrets by Matt Norton
  5. Chris Taylor interview for
  6. J.E. Sawyer's Fallout RPG
  7. Robot control terminal
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