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The Vault - Fallout Wiki
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This is a lore summary, presenting intradiegetic or in-universe information about the subject. For game characteristics and similar data, consult the table on the right.
Game-specific articles
FalloutMariposa super mutant
Fallout 2Mariposa super mutant
Fallout 3Super mutant
Super mutant brute
Super mutant master
Super mutant overlord
Super mutant behemoth
FO: New VegasSuper mutant
Super mutant brute
Super mutant master
Mariposa super mutant
Fallout 4Super mutant
Fallout 76Super mutant
FO TacticsMariposa super mutant
Fallout: BoSMariposa super mutant
Van BurenMariposa super mutant
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Gametitle-FO1.pngGametitle-FO2.pngGametitle-FO3.pngGametitle-FO3 BS.pngGametitle-FNV.pngGametitle-FNV DM.pngGametitle-FO4.pngGametitle-fo4fh.pngGametitle-F76.pngGametitle-FOT.pngGametitle-FOBOS.pngGametitle-FB.pngGametitle-VB.pngGametitle-FOOL.pngGametitle-FOX.png

Super mutants are mutated humans, products of infection by the Forced Evolutionary Virus (FEV). They are much taller, bulkier and muscular than pure strain humans, have (mostly) green, gray, or yellowish skin, are immune to disease and radiation, and are gifted with superhuman strength and endurance. Although they are completely sterile, the rapid regeneration of their cells caused by FEV makes them virtually biologically immortal (but not immune to death from injury).

There are three different known sources of super mutants in the post-War world - Mariposa Military Base in New California (on the West Coast), Vault 87 in the Capital Wasteland (on the East Coast), and The Institute in the Commonwealth (also on the East Coast). The three populations have separate histories and origins, and are yet to interact with each other. While originally the term was only used to refer to the Mariposa generations, the Brotherhood of Steel carried the term with them and applied it to those from Vault 87 upon encountering them. The term has since become the defacto name for mutants of this variety.


Super mutants are an uniform group of mutants created by the exposure of humans to the Forced Evolution Virus. Originally created by West Tek as the Pan-Immunity Virion, FEV research was spun off on governmental orders when it was realized that PVP was an extremely potent mutagen. In a nutshell, changes to DNA are expressed phenotypically thanks to recursive growth patterns coded in the FEV. The goal was the creation of super soldiers capable of fighting in any conditions with minimal preparation. The primary research effort was set up at Mariposa Military Base in California, with a competing research initiative spun-off at Vault 87 under Dr Wayne Merrick. The Commonwealth Institute of Technology also had access to FEV samples, allowing it to set up its own research efforts after the Great War.[1]

Super mutant transformation requires prolonged immersion in the virus: in Mariposa this has been achieved by a twenty-four hour exposure to FEV-II in the vats, achieving a severe overdose of the virus.[2][3] In Vault 87, infection took place in sealed chambers, where an aerosolized virus was introduced. The exposure was relatively brief, compared to the Mariposa procedure.[4][5] The Institute practiced prolonged immersion in FEV, in contained tubes.[6]

A noted feature of FEV is that it partially relies upon the DNA of the individual coming in contact with it. Coupled with portions of its own recursive code, effects of exposure can be unpredictable,[7] particularly when non-humans are exposed to the virus, or multiple organisms are placed into the same vat (vide centaurs).[8]


FEV-II super mutant

Main article: Mariposa super mutant

west coast super mutants AKA the mariposa strain

In humans, phenotypical changes brought upon by the Mariposa strain are substantial, accomplished by recursive growth patterns integrated in FEV. In order for the mutation to succeed, the subject needs to have a low level of radiation-induced damage[7] and should not have been exposed to the mutated FEV in the wasteland.[9][10] Subjects that do not meet these criteria will suffer a massive overhaul of the body's systems, leading to organ failure and an extremely painful death.[7][11]

The average super mutant is 3.2 meters tall and weighs in excess of 350 kilograms. Muscle accounts for over 75% of body mass, while bone and tissue are 10% each. Fat mass is exceedingly low, accounting for between 3-5% of body mass.[3] The increased muscle and body mass lead to a change in posture: FEV super mutants have a characteristic, hunched stance. The skin tone changes substantially and becomes gray with tints of light green, though as the mutant ages, it may become more green or even olive. The skin becomes much thicker and resistant to trauma, including cuts, bruises and damage from fire, acid or even gunfire.[3] Despite this resistance to trauma, completely destroyed tissues cannot be regrown, and will result in permanent scarring or organ loss.[12]

These changes are uniform across mutants, due to the aforementioned growth patterns and pre-programmed DNA loaded into the virus. This also has the effect of removing secondary sexual statistics, in favor of a pre-programmed masculine body shape. Primary sexual characteristics, such as the penis and testicles in males and the uterus and ovaries in females are unaffected.[13] However, super mutants are sterile, as FEV perceives gametes as damaged DNA and corrects them, resulting in sterility.[3][7]

Increased size of neural transmitters and synaptic receivers in the body give super mutants acute reflexes and heightened senses.[3] However, these changes are usually not accompanied by a similar rise in intellect. The FEV strain in Mariposa has a chance of modifying intelligence: while most people retain their pre-dipping intellect,[14] a majority of the remaining group experiences a loss (typically by 30%),[3] while the remaining minority of exceptional individuals may even experience an increase.[14] The loss is the result of damage caused by recursive growth and increase in brain mass, which may be accompanied by disfigurement and damage to existing neural patterns, causing loss of memory.[7]

The most stunning effect is practical immortality. Although theorized to only bring an approximate 10% increase in life expectancy,[3] the FEV strain in Mariposa results in a cell regeneration rate that exceeds cell death rate and prevents DNA degeneration through aging. The Hayflick limit is believed to have been completely overcome. This allows a super mutant to live for centuries, though if care is not given to exercising one's intellect, elder mutants may suffer from onset of dementia and Alzheimer's disease.[15] Death is made even more unlikely by the fact that super mutants are immune to common diseases[16] and radiation.[17]

EEP super mutant

Main article: Vault 87 super mutant

east coast vault 87 strain super mutant

Produced as part of the Evolutionary Experimentation Program, this variant of super mutants comes from an inferior FEV strain used at Vault 87. The strain retains the recursive growth patterns characteristic to FEV, but has a different effect, which may be also linked to how infection was performed in the labs. Test subjects were exposed a single time to FEV in isolated chambers, where virus was deployed as airborne particulate. When exposed, phenotypical changes occur within three days and include increased muscle mass, changes in skeletal structure and atrophy of all visible sexual characteristics, creating an uniform body shape devoid of genitalia or other sexual dimorphism.[18][19] At ten days, skin pigmentation becomes a mixture of yellow and green, while its thickness and resistance to radiation and other environmental hazards rapidly increases.[20]

However, a key problem with this batch is that the mutation does not stop. Within fourteen days of initial exposure, subjects regress to an almost feral state, exhibiting extreme aggression at every non-mutant. While some semblance of cognition is retained, exhibited by the ability to speak, operate machines and use basic tactics in combat, super mutants of this type are typically characterized by significant mental retardation.[21] Another unforeseen side effect is that the unfinished virus strain codes the body for continued growth.[19] If a super mutant of this type eludes death for prolonged periods of time, they may become a considerable threat, reaching the size of a small building.[19]

The first super mutants of this variety were created in 2078, becoming a permanent feature of the Capital Wasteland. Too dumb to overrun it, but too strong to die off.[19] Their routine behavior included raiding to kidnap people for conversion with the EEP mutagen.[22] That being said, they possess almost no intelligence. They are tough to kill, impossible to reason with, and incredibly resistant to attacks and radiation. They can speak, but their vocabulary is limited.

Their inability to reproduce (possibly bolstered by the FEV batch and/or human procreation instincts) leads to an obsession with preserving their species: they attempt to capture live humans as often as possible, in order to infect them with FEV, or "green stuff," at Vault 87.[19] However, by 2277, the mutants are running out of FEV and are looking in desperation for a new source of the virus.[23] By 2282, the Super Mutant "Shepherd" had been looking to re-organize the regions Super Mutants, but was quickly stopped by the 15 year old Arthur Maxson, a victory that would cement the young leader's standing with the West Coast Brotherhood of Steel.[24]

Huntersville super mutant

Huntersville is the source of Appalachia super mutants, created when West Tek's local research facility conducted a secret experiment dumping FEV into the local water supply. The secret, sinister experiment went horribly, horribly wrong, creating a scourge on the region that would persist as late as 2102.[25] These Mutants share a common ancestry with the Vault 87 Super Mutants but are slightly smarter and able to adapt to life in the mountains. They rarely make permanent strongholds, but will do so occasionally.

Institute super mutant

east coast commonwealth strain super mutant

The super mutants of the Commonwealth are a different strain from either Vault 87 super mutants or Mariposa super mutants. While they possess the imposing musculature and resilience of the former, they have a level of intelligence on par with the dumber examples of the latter. They are capable of following a chain of command, erecting fortifications,[26] and even setting up traps and ambushes - such as at Trinity Tower, where Fist deliberately used Rex Goodman as bait to lure humans and weed out the weak super mutants among his host. They are also capable of speaking like normal humans, unlike their practically feral brethren from the Capital Wasteland, and consider themselves the superior race of the Commonwealth.[27]

All Commonwealth super mutants are the result of The Institute's research into FEV,[28] which began in 2178 under the auspices of Doctor Frederick. Research on samples acquired by the team was authorized by the Directorate and the program began despite the objections of some members of BioScience.[29] Both women and men were abducted from the Commonwealth and submerged in The Institute's modified FEV, their mutations carefully tracked and extensively investigated. Successful mutations would be monitored to ensure survivability, then tagged and discarded.[30] In layman's terms, The Institute was simply releasing super mutants into the wild, creating a scourge on the Commonwealth that lasted for years.[31] In fact, the first super mutants attacked human settlements as early as 2180.[32] Their actions were even more heinous considering the fact that in case the mutation destabilized, it would create horrifying behemoths: Warped, immensely powerful giants with a fierce territorial instinct.[33]

The research was intended to produce effective synthetic organics, but it ground to a halt in March 2224. Despite perfecting two FEV strains, the accumulated radiation damage in test subjects provided an insurmountable barrier to further development.[34] Just three years later, in 2227, the organic synth project experienced a breakthrough due to the acquisition of Shaun and his undamaged pre-War genetic code. The third generation synth project was spun off from the FEV research initiative. The FEV research effort continued for several more decades, despite producing no useful data - except for manufacturing more super mutants for the surface to contend with.[35][36] When Brian Virgil succeeded Dr Syverson as head of the project in April 2286, it became evident that FEV experimentation ran its course and served no useful purpose, not with the availability of third generation synths.[37] Eventually, as Virgil's conscience took its toll, the scientist lodged a formal complaint with the Directorate.[35] When no reaction came, Virgil rebelled and escaped the Institute after transforming himself into a super mutant, destroying as much of the project as he could.[38]

Behind the scenes

  • The name of the super mutants is spelled differently at different points. Despite "super mutant" is the most characteristic and the most widely used, other variations exist including super mutants, super-mutant, supermutant and Mutants.
  • While Marcus the mutant in Fallout 2 claims that "it only takes a few years to get the juices flowing again" (in regards to sterility), Chris Avellone, who wrote the dialogue said that it was just a joke.
  • Some mutants in Mariposa in Fallout 2 are called "Super Duper Mutants", but it is not known why. This is most likely just a joke.
  • Fawkes prefers to use the term "Meta-Humans" when speaking about the super mutants, especially when referring to himself. However he is the only person who refers to super mutants as "Meta-Humans".


Fallout and Fallout 2

Fallout 3

Fallout: New Vegas

Fallout 4

Fallout Tactics

Fallout: Brotherhood of Steel

Van Buren

Fallout d20

Fallout Online

Appearances in games

Super mutants appear in all Fallout games.


  1. See Forced Evolutionary Virus for references.
  2. The Vault Dweller: "{142}{}{What is the current status of the patients?}"
    Vats Control Computer: "{143}{}{Current status on patients as follows: FEV batch #23872-A consists of four male units and two female units. All individuals suffering from FEV exposure. Vital signs are within normal parameters. FEV process on all subjects is approxiamtely 50% complete. Expect full FEV transformation within 12 hours.}"
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Vree's autopsy report
  4. The Lone Wanderer: "A friendly Super Mutant. Well, now I've seen everything."
    Fawkes: "Ugh. Must you use that vulgar term? Yes, I was born in the F.E.V. Chambers but a Super Mutant I certainly am not. I prefer the term Meta Human. Suits me better don't you think?"
    (Fawkes' dialogue)
  5. Vault 87 exposure chambers.
  6. FEV lab
  7. 7.0 7.1 7.2 7.3 7.4 The Vault Dweller: "{120}{}{How does the Virus work?}"
    ZAX 1.2: "{157}{}{My research into the Forced Evolution Virus, or FEV, indicates that it is a shifting-absorptive virus. It copies DNA patterns much like RNA, storing these patterns in exons.}"
    "{158}{}{These exons, combined with the FEV, are re-injected into the host cells in typical viral infectious fashion. This causes the host cells to 'regenerate' their DNA.}"
    The Vault Dweller: "{159}{}{How do you catch FEV?}"
    ZAX 1.2: "{162}{}{FEV is not 'caught', per se. It is not air-transmittable. Typically, infection is through injection, or direct physical contact with an FEV sample.}"
    The Vault Dweller: "{164}{}{Why isn't FEV affected by radiation?}"
    ZAX 1.2: "{166}{}{The FEV is a megavirus, with a protein sheath reinforced by ionized hydrogen. It is therefore capable of absorbing neutrons without becoming radioactive.}"
    The Vault Dweller: "{168}{}{If the FEV re-infects the host with its assimilated viral patterns, how does it make a 'better specimen'?}"
    ZAX 1.2: "{169}{}{The FEV is pre-programmed with introns of corrected DNA appropriate to the proper type of species. It therefore attempts to correct the DNA of the individual.}"
    "{170}{}{However, as the FEV is partially reliant upon the DNA of the individual, and also includes portions of its own recursive code, the effects can be unpredictable.}"
    "{171}{}{When inoculated into an individual with significant genetic damage, such as through radiation, it will cause the body's systems to suffer massive overhauling, leading to organ failure and death.}"
    "{172}{}{In a genetically viable individual, it re-writes portions of DNA, causing accelerated mutation, usually leading to recursive growth due to the FEV's own patterns.}"
    "{173}{}{This recursive growth leads to an increase in muscle and brain mass, but is often accompanied by disfigurement and damage to existing neural patterns, causing loss of memory.}"
    The Vault Dweller: "{174}{}{What potential long-term side effects exist?}"
    ZAX 1.2: "{178}{}{As the FEV causes constant regenerative update to DNA, it would effectively render the subject largely immortal, as cell death would be offset by augmented growth.}"
    "{179}{}{Additionally, as the gametes of the reproductive system consist of 'half-cells' using split DNA, they could be perceived as 'damage' by FEV, which would 'repair' them, rendering the subject sterile.}"
    "{180}{}{However, as my laboratory facilities are damaged beyond repair, this is conjectural. I cannot offer physical proof. You will have to, in human terms, 'take my word for it.'}"
    The Vault Dweller: "{181}{}{Could FEV mutation be corrected with a counter-virus?}"
    ZAX 1.2: "{184}{}{No. FEV does not retain unaltered original copies of the subject's DNA. Only a virus which re-infected the subject with original DNA could reverse the effects. Additionally, there is no known way to remove the FEV itself.}"
  8. Fallout Bible 0: "3. Are the radscorpions a product of the FEV virus? When you talk to the doctor, Razlo, in Shady Sands, he tells you that they were once American Emperor Scorpions but that he has no idea how they mutated because radiation alone couldn't have done it. For that matter, what about all of the other creatures of the wasteland? Which ones have been mutated by FEV and which ones haven't? Maybe in the bestiary each creature could have a stat that shows it's level of FEV infection."
    • The radscorpions are a result of a combination of radiation and the FEV virus, and Razlo in Shady Sands is correct - they were originally Emperor Scorpions that have grown... big.
    • FEV-Infected Critters in the wasteland include almost all the ones you've seen in F1 and F2:
      Most species of rats.
      Gecko lizards.
      Various varieties of plants, including the Venus Flytrap.
      Rumor has it some dogs were affected, but no one's seen any, so for now that's just rumor. Of course, the centaurs are a mash of human, dog, and various other parts... but hey, who knows how that mutation came about. Grey was probably messing around in one of his labs.
    • Creatures not mutated by FEV probably did not survive the aftermath of the Great War, with the possible exception of cockroaches... and perhaps normal ants, though there are FEV-infected versions of these species.
    • No one knows where those bird noises in Vault City came from.
    • I'll try to include a chart of FEV-infected creatures in future additions as well as other critters that you may not have seen in F1 and F2. Most likely a great majority of insects were affected (they tend to breed much faster, and their mutations tend to become evident pretty quickly as the generations advance), possibly beetles, some spiders, cockroaches, and other creatures."
  9. The Vault Dweller:"{188}{}{Why am I a prime human ?}"
    Lieutenant: "{194}{LIEUT30}{The FEV was mutated by the war radiation. Those living in this desolate wasteland have been exposed to this mutant FEV, essentially inoculating them from the full effects.}"
    The Vault Dweller: "{195}{}{So?}"
    Lieutenant: "{197}{LIEUT31}{So, you're from a Vault and have limited exposure to this mutated virus. The original FEV in the Vats should work quite well on you.}"
  10. Fallout Bible 0: "6. According to Chris A., the ghouls in V12 were exposed to radiation and FEV. I know Harold said the Vault door opened early or something, so the radiation bit makes sense. My question is, how were the ghouls of Vault 12 exposed to FEV? Harold was a special case, since he went to the Vats with... er... someone, whose shall remain nameless... and got dipped. How do you account for the others? - Richard Grey"
    "When the West Tek research facility was hit, it shattered the FEV storage tanks on levels four and five and released the FEV into the atmosphere. Through some means, perhaps propelled by the explosion, the virus was able to reach the ghouls quickly and the mutation process began even as the radiation was rotting away their bodies. How the virus was able to survive the blast without being sterilized is unknown... it would depend on what type of warhead cracked the West Tek facility like an egg.
    Actually, Harold never said he got dipped (although it's possible). He was exposed, however - being in close proximity to FEV is enough to cause mutations, as the Enclave slaves mining Mariposa discovered. I imagine the shield between the vats and the control room in Mariposa was meant to keep the virus contained."
    Note: The West Tek Research Facility is an underground bunker, which although was directly hit by a nuclear weapon did not release the Forced Evolutionary Virus. The FEV was moved to the Mariposa Military Base (a bunker under a mountain) before the Great War.
  11. Fallout Bible 8: "Peter Hopkins asks:
    I was reading version 5 of the Bible, and found a bit of a conflict with current knowledge... In one of your anwers, it was said that it was random whether the FEV increased intelligence or not. However, as far as I know, FEV increases the growth and integrity of ALL cells consistently, by doubling the amount of genetic material in the cells. In this case, an increase in brain size (assuming a healthy brain to begin with) and intelligence should be regular. Another theory could be that, as the mutant's brain grows, the mass of the mutant's body increases exponentionally and the brain would not be big enough to control the whole body and sustain the throught process of a human body. Also, it is possible that while intelligence does increase initially, the brain does not gain the resistance to radiation that the body does, and the mutant develops brain damage and shows reduced intelligence. Are any of the above true? PS There is a very good report documenting the effects of FEV and how it was developed on the No Mutants Allowed message board ( PPS I don't know about any so called 'purists', but i am hugely interested in the fallout world and would love to FOT background in the Bible.
    About FEV:
    That might be why some of the super mutants (such as the Lieutenant) are smart (or remain smart) - but generally, for some reason (I don't know off the top of my head, nor do I know if it's spelled out anywhere), they're about 30% dumber than a normal human being, if Vree's research disk in the Brotherhood of Steel is accurate. I wouldn't be surprised if the dipping process caused brain damage in dipped subjects - it's a hell of a shock to the system.
    Furthermore, everyone's favorite introspective machine intelligence, Zax, has the following to say about it:
    When inoculated into an individual with significant genetic damage, such as through radiation, it [FEV] will cause the body's systems to suffer massive overhauling, leading to organ failure and death. In a genetically viable individual, it re-writes portions of DNA, causing accelerated mutation, usually leading to recursive growth due to the FEV's own patterns. This recursive growth leads to an increase in muscle and brain mass, but is often accompanied by disfigurement and damage to existing neural patterns, causing loss of memory.
    Other possible factors that might be causing the super mutants' stupidness:
    - Most mutants have some degree of radiation poisoning, which may cause problems and brain damage, as mentioned above.
    - The process is unsafe - the mortality rate on "dippees" is pretty high. This is likely due to radiation poisoning.
    - Memory functions are "sometimes" impaired by the dipping, and intelligence loss may occur as well. Harold's memory wasn't in the best of shape after exposure.
    From the Pre-War experiment tapes, it looks like some mammals did display consistent increased intelligence (raccoons), while others didn't (the dogs) or even suffered brain damage (the chimps and the seizures). However, in an old Scott Campbell doc, there was a note that later subjects injected with the FEV (especially the chimps) hid their enhanced intelligence from their captors (or in the case of the raccoons, made a break for it).
    Furthermore, the FEV tests at West-Tek were done through injection, not dipping, so it's possible the dipping process itself that causes the brain damage. Possibly with the increased brain mass in the skull, the brain is "squeezed," and all that tasty juice runs out the ears.
    Still, on the other hand, a lot of the animals Grey talks about in his experiment tapes that were running around the Military Base were getting smarter from the FEV, and he himself became supra-intelligent.
    So there's a long-winded series of random answers. Moving on!"
  12. The cybernetic implants, branding scars, and the amputated tongue of Lieutenant, Dog and God, and Mean Sonofabitch respectfully are examples of permanent tissue damage.
  13. The Vault Dweller: "{132}{}{You can't possibly take on the entire world.}"
    Master: "{134}{Mast10}{I'm not after the world, yet. When I turn your fellow vault-dwellers into mutants, my forces will be too strong for any to stand against! But don't worry, you won't care. Care! Care!}"
  14. 14.0 14.1 Fallout Bible 5:
    "5. In F1 the Lieutenant said that the FEV raises intelligence. There are, however, very many dumb mutants. What can you say about it? And what do you think of my theory, which i've been using in my Fallout PnP campaign?
    Sorry, Pawel, for two things: I wasn't able to personally respond to your email because I kept getting bounced, and two, I wasn't able to comment on your FEV theory (as a reminder, I can't read fan-created material, so just send questions, comments, or facts if you can).
    As for the FEV enhancing intelligence, the original Pre-War FEV at West Tek did, and more consistently than the Fallout-era virus.
    The current Fallout-era FEV does enhance intelligence - in some people. Just not many. The Lieutenant was one of the lucky ones who didn't become a knuckle-dragging, butt-scratching moron after being dipped (and it may not have raised his intelligence, he may have been that smart before his dipping, but no records of his past exist to verify this).
    The FEV that was released out in the wasteland was mutated by radiation, so its effects changed. As for the FEV at Mariposa, the Lieutenant says the super mutants are smarter than humans ("We are highly intelligent and immune to disease"), which is only half-right, and he also says that the virus can also interfere with a person's memory, causing them to forget things. Obviously, the Lieutenant keeps forgetting that most of his super mutant forces can barely form complete sentences.
    Basically, the FEV in the vats only has a small chance of raising a being's intelligence (or even keeping it intact). The Master was one of the lucky ones. More often than not, it causes brain damage. It's also possible that the crude dipping procedure in Mariposa also caused imperfect mutations as well, reducing the chance of heightened intelligence.
    But to answer your question: the FEV at West Tek before the war caused increased intelligence in its subjects, but the FEV at Mariposa after the war rarely enhanced the intelligence of humans who were dipped. The reason for this is unknown.
    Chris Taylor says:
    Chris Taylor: Actually, a dip in FEV has a chance of modifying Intelligence, but it doesn't always increase it. Some people do gain increased intelligence, a larger majority lose intelligence and most people remain the same. It also depends if people have enough radiation damage to be turned into ghouls or super mutants."
  15. Broken Hills mutants (Mutant miner, Old mutant), and those appearing elsewhere, are long lived, but some show signs of impaired cognitive function.
  16. The Vault Dweller: "{141}{}{How are you more advanced?}"
    Lieutenant: "{149}{LIEUT14}{Intuitively obvious to the most casual observer. We are highly intelligent and immune to disease. The strong survive! It is our goal to improve the human race.}"
  17. The Master: "{168}{Mast27}{Your humor will not save you now. Do you accept my offer, or not? Not! Accept!}"
    The Vault Dweller: "{169}{}{Not.}"
    The Master: "{171}{Mast28}{Radiation has no effect on us. The FEV virus makes us immune. Your argument is weak, and so are you.}"
  18. Vault 87 terminals; Chief Physician's Terminal, Entry 87-34224
  19. 19.0 19.1 19.2 19.3 19.4 Fallout 3 Official Game Guide Game of the Year Edition p.42: "Super Mutants"
    "The Super Mutants that infest the urban ruin of Washington D.C. originated in Vault 87. Those unlucky enough to have reserved space in Vault 87 soon found themselves forcefully taken to a secure part of the vault, where they were locked in airtight chambers and exposed to a concentrated form of the F.E.V. The Overseer and his security force had no real idea what to expect; they were simply following the "plan." When the exposed vault dwellers started transforming into Super Mutants, nearly the entire vault population had been exposed. Those who hadn't yet metamorphosed knew what was coming, and, didn't end well for humanity.
    The dwellers of Vault 87 were turned into Super Mutants in 2078, and have been a presence in the Capital Wasteland ever since. Most of those original Super Mutants have long since been killed. But whether it's because of the nature of the F.E.V. they were exposed to, or a simple underlying human instinct, the Super Mutants of the Capital Wasteland are obsessed with the preservation of their own species. Super Mutants are asexual and incapable of procreation, so their only way of reproducing is to kidnap other humans, drag them back to the Vault 87 chambers, and infect them with F.E.V. And so they have done, for nearly 200 years.
    Super Mutant society is loosely hierarchical, with the weaker (most recently transformed) Super Mutants generally giving way to the stronger. The Super Mutant hierarchy, as defined by the Capital Wasteland contingent of the Brotherhood of Steel, is as follows: Grunt, Brute, Master, and Behemoth. Generally speaking, the Super Mutants of the Capital Wasteland get bigger, stronger, and dumber as they age. The Behemoths are so strong and savage that they’re the only thing feared by the other Super Mutants."
    (Fallout 3 Official Game Guide faction profiles)
  20. Vault 87 terminals; Chief Physician's Terminal, Entry 87-34265
  21. Vault 87 terminals; Chief Physician's Terminal, Entry 87-34335
  22. The Lone Wanderer: "Why did they build the walls?"
    Manya Vargas: "Well, the Raiders, for one. Once the town got big enough, they'd wait until the traders and their guards were away, then come in and clean us out! Now the Super Mutants... They were a whole other breed of problem. They'd kill us if they had to, but mostly they tried to drag people away! Alive! So, eventually, my father did something about it. Him and a few others organized the traders and the citizens and built the walls. So we're pretty safe now. Still, I wish those Brotherhood of Steel fellers hadn't hit on such hard times. They really helped keep the wolves at bay."
    (Manya Vargas' dialogue)
  23. Vault 87 conversation between two mutants.
  24. Prydwen terminals#Accomplishments
  25. Fallout 76 loading screen hints
  26. Prydwen terminals; Scribe Neriah's Terminal, Entry 0769-CM22
  27. Fallout 4 loading screen hints: "Super Mutants are stronger and more resilient than humans, and consider themselves the Commonwealth's superior race."
  28. FEV lab
  29. FEV research notes: "Uhh... This is Doctor Elliott, with the official report for the Directorate from BioScience. The date is, umm, August 2178. I'm pleased to report that, as has been the case during my tenure, crop yields exceed expectations. In point of fact, everything down here is fine... with... one notable exception. Doctor Frederick has informed me that the Directorate has pre-approved research on samples of the FEV virus, which he already has in his possession. Now, I'm not one to question the Directorate... you all know that. I don't even want to know where this came from. But... well, this is troubling. Dangerous, possibly. I will do my best to make sure risks are minimized, but I really do hope that the consequences are understood."
  30. The Institute terminals; Terminal, Subject CM-153: "Baseline: Male, early 30s. Moderate overall health.
    Post-submersion results: Physical condition consistent with standard results. Mental acuity charting slightly higher than average.
    Subject Status: TAGGED, DISCARDED"
  31. Preston Garvey: "Those Super Mutants have been raiding across the Commonwealth for years. I'm glad to have the Brotherhood's help clearing them out."
  32. Fallout 4 loading screen hints: "The Minutemen first rose to prominence in the year 2180, when they defended Diamond City against a horde of Super Mutant attackers."
  33. The Sole Survivor: "Do you remember Edgar Swann?"
    Brian Virgil: "Swann? ...Yes, I saw his file. He was one of our first test subjects, years ago. His mutations destabilized. Started turning into a Behemoth. ...You think that could happen to me? Maybe I'm fine for a few months, a few years, but... god. I couldn't live like that."
    (Brian Virgil's dialogue)
  34. BioScience division report, 2224: "This is Doctor Elliott, reporting for the BioScience division. March 2224. We just received another batch of... subjects... but as my previous report stated, we're at an impasse here. More of the same won't help. I am officially echoing the team's position: the most likely progress for our research on synthetic organics requires new avenues of exploration. The two most promising strains of FEV have been adapted to an ideal state, but... we're still missing something. Additional Commonwealth subjects will not help. It's the same problem across the board: exposure to too much radiation."
  35. 35.0 35.1 The Institute terminals: "2287.2.10
    Entered By: Virgil.B
    Nothing new. Always the same. Have entered formal complaint with Directorate; these tests are not bringing in any valuable information. The organics project was spun off decades ago. Why do we insist on continuing this?"
  36. The Institute terminals: "2277.7.10
    Entered By: Syverson.C
    Latest round of testing complete. Results are all within expected parameters. Informed Dr. Zimmer directly, as he had ordered the tests personally. He seemed annoyed with the results; unsure what he was looking for. He declined to specify why he wanted the tests run to begin with."
  37. The Institute terminals: "2286.4.10
    Entered by: Virgil.B
    I have officially assumed the lead role on the project after Dr. Syverson's passing.
    Latest round of subjects show results similar to previous test runs over last 5 years. No statistical deviation noted.
    Synthetic organics continue to perform well; the necessity of further tests is unexplained."
  38. Brian Virgil Personal Log 0176