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* ''Series/{{PixelFace}}'': In "You're History", Alexia receives a gift from her Russian uncle: a red jigsaw block. But the block starts multiplying, and soon the console is overrun with coloured shapes falling out of the air. And these shapes are replicating by 'eating' the console's memory. If they consume all of it, everything in the console, including the player characters, will be wiped out.


* The villain Mantrid in the second season of ''{{Series/Lexx}}'' used Mantrid drones -- basically flying arms -- to systematically disassemble and convert all matter in the universe into more Mantrid drones. By the end of the season, nearly three-quarters of the universe had been converted, and the remainder would have been finished off within a few days. [[spoiler:Kai tricks Mantrid into flying the sum-total of his drones directly to the center of the universe, precipitating a Big Crunch which destroyed that universe but ejected the Lexx and crew into the next one over.]]



* The villain Mantrid in the second season of ''{{Series/Lexx}}'' used Mantrid drones -- basically flying arms -- to systematically disassemble and convert all matter in the universe into more Mantrid drones. By the end of the season, nearly three-quarters of the universe had been converted, and the remainder would have been finished off within a few days. [[spoiler:Kai tricks Mantrid into flying the sum-total of his drones directly to the center of the universe, precipitating a Big Crunch which destroyed that universe but ejected the Lexx and crew into the next one over.]]
* In the ''Series/TalesOfTomorrow'' episode "Red Dust", space explorers who've just visited a once-populated world overrun by Red Goo discover the pink crystalline "dust" has infested their ship, as well.



* In the ''Series/TalesOfTomorrow'' episode "Red Dust", space explorers who've just visited a once-populated world overrun by Red Goo discover the pink crystalline "dust" has infested their ship, as well.



* Gray Goo is discussed in ''TabletopGame/{{GURPS}}: Ultra-Tech'' in a section on Von Neumann machines and points out the waste heat of the goo eating a planet is likely a more pressing threat than being eaten by it. On the up side they require extremely high level technology and are expensive to make, on the down side some versions might be able to fly or travel through space.



* Virus Bombs of ''TabletopGame/{{Warhammer 40000}}'' work on a similar principle to the Red or Black Goo scenario noted above. They utilize something called the Life-Eater virus, which consumes everything organic on a planet and leaves behind massive, highly flammable swamps and gas clouds. A follow-up series of incendiary missiles ignites a planet-wide firestorm that scours any remaining life from the surface, leaving nothing behind but a glowing, lifeless rock. The Imperium uses them in dire situations when [[TheEndOfTheWorldAsWeKnowIt a problem can only be solved by destroying a planet]]. For added NightmareFuel, note that the Life-Eater is absolutely in the [[EldritchAbomination Chaos God]] [[{{Plaguemaster}} Nurgle's]] wheelhouse. Many of those who have the authority to use these world ending protocols have wisened up, and will prefer to use a [[EarthShatteringKaboom Cyclonic torpedo]] instead.



** Clockwork horrors are tiny mechanical beings that methodically and very efficiently scour areas of metal, which they use to build more clockwork horrors and continue the cycle. They leave stone, soil and organic material alone, but if left unchecked can easily devastate entire countries or ever strip whole worlds of worked and unworked metal.
* ''TabletopGame/{{Pathfinder}}'':
** The main game has stats for this as a monster, right down to the name. It's considerably dangerous, able to rapidly devour characters (and their gear!) in its space, infest a single target to devour them even faster, and disperse itself to hide from pursuers. And as a swarm, its immune to weapon damage and targetted spells, meaning depending on your party composition you may have a hard time hurting it at all. (Incidentally, this isn't a case of AWizardDidIt -- ''Pathfinder'' Grey Goo is an actual cloud of high-tech nanomachines. It's assumed to come from Numeria, where an ancient crashed spaceship left a bunch of high technology scattered throughout the landscape.)
** ''TabletopGame/{{Starfinder}}'' has the Assembly Ooze, runaway nano-fabrication units that thankfully do not grow uncontrollably (and only rarely make more of themselves), but instead turn everything they eat into whatever they were designed to make. They may seem harmless (unless you happen to be an android or other robotic lifeform), or even beneficial, until one gets into your ship and tries to turn the engine into a pile of laser rifles.

to:

** Clockwork horrors are tiny mechanical beings that methodically and very efficiently scour areas of metal, which they use to build more clockwork horrors and continue the cycle. They leave stone, soil and organic material alone, but if left unchecked can easily devastate entire countries or ever even strip whole worlds of worked and unworked metal.
* ''TabletopGame/{{Pathfinder}}'':
** The main game has stats for this as a monster, right down to the name. It's considerably dangerous, able to rapidly devour characters (and their gear!) in its space, infest a single target to devour them even faster, and disperse itself to hide from pursuers. And as a swarm, its immune to weapon damage and targetted spells, meaning depending on your party composition you may have a hard time hurting it at all. (Incidentally, this isn't a case of AWizardDidIt -- ''Pathfinder'' Grey Goo is an actual cloud of high-tech nanomachines. It's assumed to come from Numeria, where an ancient crashed spaceship left a bunch of high technology scattered throughout the landscape.)
** ''TabletopGame/{{Starfinder}}'' has the Assembly Ooze, runaway nano-fabrication units that thankfully do not grow uncontrollably (and only rarely make more of themselves), but instead turn everything they eat into whatever they were designed to make. They may seem harmless (unless you happen to be an android or other robotic lifeform), or even beneficial, until one gets into your ship and tries to turn the engine into a pile of laser rifles.
metal.



* ''TabletopGame/{{Shadowrun}}'': {{Discussed|Trope}}. Nanotech became very pervasive in 4th edition, and the Grey Goo concept is brought up, only written off as "unlikely to ever come to pass" and "an urban myth" by some of the (legit) top scientific experts in universe. Ultimately {{Averted}} as even when nanotech starts to fall prey to hostile A.I., it's shown that it isn't capable of destruction on anywhere near this scale, though it still proves to be ''very'' dangerous.

to:

* ''TabletopGame/{{Shadowrun}}'': {{Discussed|Trope}}. Nanotech became very pervasive in 4th edition, and ''TabletopGame/TheEndOfTheWorld'' has the Grey Goo concept is brought up, only written off as "unlikely to ever come to pass" and "an urban myth" by some "Nanopocalypse" scenario in its fourth book "Revolt of the (legit) top scientific experts in universe. Ultimately {{Averted}} as even when nanotech Machines", where a swarm of nanobots originally developed to destroy cancer cells starts to fall prey to hostile A.I., consuming ''everything'' carbon-based, including trees, asphalt, soil, and people. It's perhaps the bleakest of the scenarios in the book or any other books- not only is almost all of the Earth left a lifeless desert of inorganic dust in the span of about ''two weeks'', what remains of humanity lives in the Antarctic, as the nanobots can't stand the cold. Even then it's shown implied that it isn't capable there aren't enough renewable resources to go around, leaving humanity- and all life on earth- to slowly die a cold, lonely end.
* Gray Goo is discussed in ''TabletopGame/{{GURPS}}: Ultra-Tech'' in a section on Von Neumann machines and points out the waste heat
of destruction the goo eating a planet is likely a more pressing threat than being eaten by it. On the up side they require extremely high level technology and are expensive to make, on anywhere near this scale, though it still proves the down side some versions might be able to be ''very'' dangerous.fly or travel through space.



* ''TabletopGame/TheEndOfTheWorld'' has the "Nanopocalypse" scenario in its fourth book "Revolt of the Machines", where a swarm of nanobots originally developed to destroy cancer cells starts consuming ''everything'' carbon-based, including trees, asphalt, soil, and people. It's perhaps the bleakest of the scenarios in the book or any other books- not only is almost all of the Earth left a lifeless desert of inorganic dust in the span of about ''two weeks'', what remains of humanity lives in the Antarctic, as the nanobots can't stand the cold. Even then it's implied that there aren't enough renewable resources to go around, leaving humanity- and all life on earth- to slowly die a cold, lonely end.

to:

* ''TabletopGame/TheEndOfTheWorld'' ''TabletopGame/{{Pathfinder}}'':
** The main game
has stats for this as a monster, right down to the "Nanopocalypse" scenario in its fourth book "Revolt of the Machines", where a swarm of nanobots originally developed to destroy cancer cells starts consuming ''everything'' carbon-based, including trees, asphalt, soil, and people. name. It's perhaps considerably dangerous, able to rapidly devour characters (and their gear!) in its space, infest a single target to devour them even faster, and disperse itself to hide from pursuers. And as a swarm, its immune to weapon damage and targetted spells, meaning depending on your party composition you may have a hard time hurting it at all. (Incidentally, this isn't a case of AWizardDidIt -- ''Pathfinder'' Grey Goo is an actual cloud of high-tech nanomachines. It's assumed to come from Numeria, where an ancient crashed spaceship left a bunch of high technology scattered throughout the bleakest landscape.)
** ''TabletopGame/{{Starfinder}}'' has the Assembly Ooze, runaway nano-fabrication units that thankfully do not grow uncontrollably (and only rarely make more of themselves), but instead turn everything they eat into whatever they were designed to make. They may seem harmless (unless you happen to be an android or other robotic lifeform), or even beneficial, until one gets into your ship and tries to turn the engine into a pile of laser rifles.
* ''TabletopGame/{{Shadowrun}}'': {{Discussed|Trope}}. Nanotech became very pervasive in 4th edition, and the Grey Goo concept is brought up, only written off as "unlikely to ever come to pass" and "an urban myth" by some
of the scenarios (legit) top scientific experts in the book or any other books- not only is almost all of the Earth left a lifeless desert of inorganic dust in the span of about ''two weeks'', what remains of humanity lives in the Antarctic, universe. Ultimately {{Averted}} as the nanobots can't stand the cold. Even then even when nanotech starts to fall prey to hostile A.I., it's implied shown that there aren't enough renewable resources it isn't capable of destruction on anywhere near this scale, though it still proves to go around, leaving humanity- and all life on earth- to slowly die a cold, lonely end.be ''very'' dangerous.



* Virus Bombs of ''TabletopGame/{{Warhammer 40000}}'' work on a similar principle to the Red or Black Goo scenario noted above. They utilize something called the Life-Eater virus, which consumes everything organic on a planet and leaves behind massive, highly flammable swamps and gas clouds. A follow-up series of incendiary missiles ignites a planet-wide firestorm that scours any remaining life from the surface, leaving nothing behind but a glowing, lifeless rock. The Imperium uses them in dire situations when [[TheEndOfTheWorldAsWeKnowIt a problem can only be solved by destroying a planet]]. For added NightmareFuel, note that the Life-Eater is absolutely in the [[EldritchAbomination Chaos God]] [[{{Plaguemaster}} Nurgle's]] wheelhouse. Many of those who have the authority to use these world ending protocols have wisened up, and will prefer to use a [[EarthShatteringKaboom Cyclonic torpedo]] instead.



* ''VideoGame/TastyPlanet'' is a game based on Grey Goo where a cleaning agent gets bigger and bigger as you guide it through the levels starting on a Petri Dish until it eats the planet, then the solar system, galaxy, universe, space and time! [[spoiler:Then it explodes and everything starts over.]]
* The last "secret" life form class on ''VideoGame/SimEarth'', [[MechanicalLifeforms robots]] (unlocked by [[NukeEm bombing a Nanotech-class city]], fittingly enough), are very well-suited for survival. By this, it means that they reproduce rapidly, they can live in any habitat -- even the ocean -- and thus can spread across the entire map with little effort, competing against organic life [[CurbStompBattle can't even be called a competition]], and -- oh yeah. [[NighInvulnerability They're immune to disasters]], even ones activated by the player. [[AIIsACrapshoot All organic life on your planet will quickly go extinct when these guys show up]].
* The TrueFinalBoss of ''VideoGame/SuperRobotWarsOriginalGeneration'', [[spoiler: Septuagint]], can be seen as this. It may be more of [[spoiler: purple crystals]], but its directive is clear: exterminate the whole world by consuming anything to come to its path, and it can even make [[spoiler: crystal-based]] duplicates of things it has consumed.
* In the ''Franchise/MassEffect'' games, you can find a planet called Zaherux, which is covered with seas of silicon. The flavor text mentions that a popular extranet meme says that the oceans are actually a huge swarm of 'disassembler' nanites.
* Biological version in ''VideoGame/Outpost2: Divided Destiny''. A terraforming microbe runs wildly out of control, breaking down organic matter, among other things, and forcing both colonies on the planet to try to evacuate-one of the rare versions in which the Goo truly is unstoppable, though one colony can delay it briefly, and the omnipresent threat during the campaign.
* In ''VideoGame/HostileWatersAntaeusRising'', the "alien" antagonists have a Disassembler cannon which fires nanites that are programmed to rip apart matter on a subatomic level. This avoids the usual grey goo problem of endless replication, as the nanites just run out of steam, while still producing similar destruction. It fires at a city and reduces it to mush. It's up to you to blow up the cooling radiators before it fires its third salvo and destroys Central, the world capital. Once you do that, the next shot blows it to hell and spreads disassemblers throughout their base.

to:

* ''VideoGame/TastyPlanet'' ''[[Videogame/AIWarFleetCommand AI War 2]]:'' The appropriately-named Nanocaust is a game based on Grey Goo where a cleaning agent gets bigger nanite plague capable of infecting and bigger as you guide it through the levels starting on spreading from spaceship to spaceship like a Petri Dish until it eats the planet, then the solar system, galaxy, universe, space plague, and time! [[spoiler:Then it explodes and forming hives upon planets to consume everything starts over.]]
* The last "secret" life form class on ''VideoGame/SimEarth'', [[MechanicalLifeforms robots]] (unlocked by [[NukeEm bombing a Nanotech-class city]], fittingly enough),
in them for the purpose of more reproduction and consumption. It's unknown where it came from (both aliens and renegade humans are very well-suited for survival. By this, it means that they reproduce rapidly, they can live in any habitat -- suspected), but even the ocean -- AI has problems handling it; the description mentions it's the sort of rampaging threat that usually keeps it busy outside the galaxy with its back turned to you.
* The plot of ''VideoGame/BlamMachineHead'' starts after a programmer at the world's biggest manufacturer attempts to inject himself with nanomachines to remodel his physique, causing the nanomachines to go airbornes
and thus can spread kill anything not matching his DNA.
* ''VideoGame/{{Brawlhalla}}'' in the backstory of Barraza, it's described how [[MegaCorp Meyer's Baby Food Corporation]] attempted a desperate move on a rogue agent's hideout by deploying a self-replicating nanobot cloud on them. These nanobots bricked anything that relied on computer circuitry... which in 2150 was ''everything''. The nanobots were supposed to go inert after 20 minutes, but for some reason they didn't. The end result was the Mad Max-esque post-apocalypse world that Barraza comes from.
* Tiberium in the main ''[[VideoGame/CommandAndConquerTiberianSeries Command & Conquer]]'' series is a crystalline substance that, over the course of half a century, drastically alters Earth's climate and mutates its life forms as it spreads
across the entire map planet. ''[[VideoGame/CommandAndConquerTiberiumWars Tiberium Wars]]'' reveals that not only is Tiberium an extremely valuable resource, it's used as a form of HostileTerraforming by the alien Scrin, who seed planets with little effort, competing against organic life [[CurbStompBattle can't even be it, wait for the natives to wipe themselves out fighting over the stuff, and move in to harvest once everyone who could resist them is dead.
* One of the possible upgrades for your Alchemy Labs in ''VideoGame/CookieClicker'' is
called a competition]], and -- oh yeah. [[NighInvulnerability They're immune "Beige Goo" According to disasters]], even ones activated by the player. [[AIIsACrapshoot All organic life on your planet will quickly go extinct when these guys show up]].
* The TrueFinalBoss of ''VideoGame/SuperRobotWarsOriginalGeneration'', [[spoiler: Septuagint]], can be seen as this. It may be more of [[spoiler: purple crystals]], but its directive is clear: exterminate the
description, it turned three whole world by consuming anything to come to its path, and it can even make [[spoiler: crystal-based]] duplicates of things it has consumed.
* In
''galaxies'' into cookies.
** If you bake enough cookies,
the ''Franchise/MassEffect'' games, you can find a planet called Zaherux, which is covered with seas of silicon. The flavor text mentions that a popular extranet meme says news blurb claims that the oceans are actually a huge swarm of 'disassembler' nanites.
* Biological version in ''VideoGame/Outpost2: Divided Destiny''. A terraforming microbe runs wildly out of control, breaking down organic matter, among other things, and forcing both colonies on
universe itself has turned into cookies to the planet to try to evacuate-one of the rare versions in which the Goo truly is unstoppable, though one colony can delay it briefly, and the omnipresent threat during the campaign.
* In ''VideoGame/HostileWatersAntaeusRising'', the "alien" antagonists have a Disassembler cannon which fires nanites that are programmed to rip apart matter on a subatomic level. This avoids the usual grey goo problem of endless replication, as the nanites just run out of steam, while still producing similar destruction. It fires at a city and reduces it to mush. It's up to you to blow up the cooling radiators before it fires its third salvo and destroys Central, the world capital. Once you do that, the next shot blows it to hell and spreads disassemblers throughout their base.
molecular level.



* A possible story line from ''VideoGame/{{Duskers}}'' talks about the gray goo possibly wiping out life in the universe, or just within the Drone pilots area of operation.
* The ''VideoGame/GodEater'' series has Oracle Cells, single-celled organisms that seek out and consume compatible matter to grow and evolve. What matter is "compatible" differs on a cell-by-cell basis known as "bias factor", and everything on Earth is accounted for (except, oddly, water). It's not just a gooey tidal wave though: when a cluster of Oracle Cells can get a pile of the right compatibility to form, you get an Aragami, a monster who goes around eating matter to distribute it to its constituent cells (which are ''still'' trying to consume each other, resulting in a constantly-evolving beast). Pretty much the only reason humanity hasn't been wiped out completely yet is because these Aragami try to out-Darwin each other just as much as going after raw material, but [[BigGood Fenrir]] is still in a race against time against a nightmare scenario of an Aragami capable of adsorbing all others forming. So far they've only been able to delay this, by having their God Eaters destroy the core cells, causing all Oracle Cells in an Aragami to lose cohesion and start from scratch.
* The RTS game ''VideoGame/GreyGoo2015'' has you-know-what as one of the factions. Apparently it was originally designed by humans to explore space, but its programming got corrupted somewhere and now it just attempts to consume all before it. [[spoiler: Though eventually it is revealed it is attempting to consume all before it for a reason and not just due to programming corruption -- it's a desperation move to build up an army against an attacking alien intelligence]].
* Provides the backstory and setting for ''VideoGame/{{Hawken}}''. In the endless CorporateWarfare on the planet Illal, one of the three dominant {{Mega Corp}}s collapsed, triggering a self-replicating nano virus that converts the environment into a labyrinth of patchwork metal--known as the "Giga Structure" and "Hawken Virus." At the time of the game's launch, the virus covered a third of the planet.
* In ''VideoGame/HostileWatersAntaeusRising'', the "alien" antagonists have a Disassembler cannon which fires nanites that are programmed to rip apart matter on a subatomic level. This avoids the usual grey goo problem of endless replication, as the nanites just run out of steam, while still producing similar destruction. It fires at a city and reduces it to mush. It's up to you to blow up the cooling radiators before it fires its third salvo and destroys Central, the world capital. Once you do that, the next shot blows it to hell and spreads disassemblers throughout their base.
* A variation of this occurred in ''VideoGame/HorizonZeroDawn'' - [[spoiler:a line of robotic soldiers that consumed biomass as fuel (supposed to only be in emergency situations) and could self-replicate was one day stricken with a glitch that made them ignore all commands and go rogue, and due to their highly advanced coding and the fact that the CEO of the company that created them [[LethallyStupid specifically told the engineers to not install a backdoor]], it was nigh-unstoppable and these rogue robotic soldiers consumed '''all organic life on the planet''' in less than two years. The title is derived from the in universe project meant to not only shut the rogue bots down, but to also bring life back to Earth through a highly advanced AI system.]]
** [[spoiler:How did the aforementioned bots consume their biomass?]] [[spoiler:They had nanites of their own, which stripped the biomass and carried it back to the bot. And sometimes they targeted ''humans''.]]
* In the ''Franchise/MassEffect'' games, you can find a planet called Zaherux, which is covered with seas of silicon. The flavor text mentions that a popular extranet meme says that the oceans are actually a huge swarm of 'disassembler' nanites.
* Part of the plot of ''VideoGame/MightyNo9''. [[spoiler:The FinalBoss, Trinity,]] was accidentally programmed to absorb everything it can, and it does. Which results in it absorbing nearly an entire building, transforming it into the game's cube-like equivalent of nanobots.
* In [[SuperSmoke Smoke's]] ending in ''VideoGame/MortalKombatArmageddon'', the power of [[ElementalEmbodiment Blaze]] causes his nanobots to go into overdrive, consuming all of Edenia and replacing it with a sentient mass of grey goo that calls itself Smoke.
* Biological version in ''VideoGame/Outpost2: Divided Destiny''. A terraforming microbe runs wildly out of control, breaking down organic matter, among other things, and forcing both colonies on the planet to try to evacuate-one of the rare versions in which the Goo truly is unstoppable, though one colony can delay it briefly, and the omnipresent threat during the campaign.
* ''VideoGame/ParasiteEve'' features massive amounts of Pink Goo. The BigBad is actually a PatientZero infected with intelligent pink goo by accident. Every enemy in the game was created by the pink goo. If you go on to the Chrysler Building in the [[NewGamePlus EX game]], the building itself is infected with the pink goo (which is the in-world reasons that mode has random maps) and pink goo is literally everywhere.



--->Sister Miriam Godwinson, "[[FictionalDocument We Must Dissent]]"
* Tiberium in the main ''[[VideoGame/CommandAndConquerTiberianSeries Command & Conquer]]'' series is a crystalline substance that, over the course of half a century, drastically alters Earth's climate and mutates its life forms as it spreads across the planet. ''[[VideoGame/CommandAndConquerTiberiumWars Tiberium Wars]]'' reveals that not only is Tiberium an extremely valuable resource, it's used as a form of HostileTerraforming by the alien Scrin, who seed planets with it, wait for the natives to wipe themselves out fighting over the stuff, and move in to harvest once everyone who could resist them is dead.
* Grey goo missiles called the "Nano Virus" are a high-level planetary siege weapon in ''VideoGame/SwordOfTheStars''. It is amusingly classified as a bio-weapon, meaning you have to go through several tiers worth of gene modification to access it. The Nano Virus is harmless to organics, but the planet's industrial output will be heavily damaged and it will wipe out an AI rebellion as if they were living creatures hit by a regular bio weapon. It is the only bio weapon that will affect the Zuul, since their machinery is made of the same metal as everyone else's.
* ''VideoGame/ParasiteEve'' features massive amounts of Pink Goo. The BigBad is actually a PatientZero infected with intelligent pink goo by accident. Every enemy in the game was created by the pink goo. If you go on to the Chrysler Building in the [[NewGamePlus EX game]], the building itself is infected with the pink goo (which is the in-world reasons that mode has random maps) and pink goo is literally everywhere.
* A grey goo like attack is possible in ''VideoGame/SupremeCommander2''. The Cybran Nation can upgrade their engineers to have weapons, by doing this and building nothing but engineers you will get an ever growing blob of engineers that will automatically shoot every enemy in sight and use the remains to build more engineers. [[http://www.pcgamer.com/2010/06/20/engineering-victory-in-supreme-commander-2/ Full instructions here]].
* In [[SuperSmoke Smoke's]] ending in ''VideoGame/MortalKombatArmageddon'', the power of [[ElementalEmbodiment Blaze]] causes his nanobots to go into overdrive, consuming all of Edenia and replacing it with a sentient mass of grey goo that calls itself Smoke.

to:

--->Sister -->Sister Miriam Godwinson, "[[FictionalDocument We Must Dissent]]"
* Tiberium in the main ''[[VideoGame/CommandAndConquerTiberianSeries Command & Conquer]]'' series is a crystalline substance that, over the course of half a century, drastically alters Earth's climate and mutates its The last "secret" life forms as form class on ''VideoGame/SimEarth'', [[MechanicalLifeforms robots]] (unlocked by [[NukeEm bombing a Nanotech-class city]], fittingly enough), are very well-suited for survival. By this, it spreads means that they reproduce rapidly, they can live in any habitat -- even the ocean -- and thus can spread across the planet. ''[[VideoGame/CommandAndConquerTiberiumWars Tiberium Wars]]'' reveals that not only is Tiberium an extremely valuable resource, it's used as entire map with little effort, competing against organic life [[CurbStompBattle can't even be called a form of HostileTerraforming competition]], and -- oh yeah. [[NighInvulnerability They're immune to disasters]], even ones activated by the alien Scrin, who seed planets with it, wait for the natives to wipe themselves out fighting over the stuff, and move in to harvest once everyone who could resist them is dead.
* Grey goo missiles called the "Nano Virus" are a high-level planetary siege weapon in ''VideoGame/SwordOfTheStars''. It is amusingly classified as a bio-weapon, meaning you have to go through several tiers worth of gene modification to access it. The Nano Virus is harmless to organics, but the planet's industrial output
player. [[AIIsACrapshoot All organic life on your planet will be heavily damaged and it will wipe out an AI rebellion as if they were living creatures hit by a regular bio weapon. It is the only bio weapon that will affect the Zuul, since their machinery is made of the same metal as everyone else's.
* ''VideoGame/ParasiteEve'' features massive amounts of Pink Goo. The BigBad is actually a PatientZero infected with intelligent pink goo by accident. Every enemy in the game was created by the pink goo. If you
quickly go on to the Chrysler Building in the [[NewGamePlus EX game]], the building itself is infected with the pink goo (which is the in-world reasons that mode has random maps) and pink goo is literally everywhere.
* A grey goo like attack is possible in ''VideoGame/SupremeCommander2''. The Cybran Nation can upgrade their engineers to have weapons, by doing this and building nothing but engineers you will get an ever growing blob of engineers that will automatically shoot every enemy in sight and use the remains to build more engineers. [[http://www.pcgamer.com/2010/06/20/engineering-victory-in-supreme-commander-2/ Full instructions here]].
* In [[SuperSmoke Smoke's]] ending in ''VideoGame/MortalKombatArmageddon'', the power of [[ElementalEmbodiment Blaze]] causes his nanobots to go into overdrive, consuming all of Edenia and replacing it with a sentient mass of grey goo that calls itself Smoke.
extinct when these guys show up]].



* Provides the backstory and setting for ''VideoGame/{{Hawken}}''. In the endless CorporateWarfare on the planet Illal, one of the three dominant {{Mega Corp}}s collapsed, triggering a self-replicating nano virus that converts the environment into a labyrinth of patchwork metal--known as the "Giga Structure" and "Hawken Virus." At the time of the game's launch, the virus covered a third of the planet.
* The EldritchAbomination Deus from ''VideoGame/{{Xenogears}}'' is upgraded from a simple biological weapon into a living mass of Grey Goo by the game's BigBad Krelian through nanomachines.
* The RTS game ''VideoGame/GreyGoo2015'' has you-know-what as one of the factions. Apparently it was originally designed by humans to explore space, but its programming got corrupted somewhere and now it just attempts to consume all before it. [[spoiler: Though eventually it is revealed it is attempting to consume all before it for a reason and not just due to programming corruption -- it's a desperation move to build up an army against an attacking alien intelligence]].



* A possible story line from ''VideoGame/{{Duskers}}'' talks about the gray goo possibly wiping out life in the universe, or just within the Drone pilots area of operation.
* Part of the plot of ''VideoGame/MightyNo9''. [[spoiler:The FinalBoss, Trinity,]] was accidentally programmed to absorb everything it can, and it does. Which results in it absorbing nearly an entire building, transforming it into the game's cube-like equivalent of nanobots.
* The plot of ''Blam! Machine Head'' starts after a programmer at the world's biggest manufacturer attempts to inject himself with nanomachines to remodel his physique, causing the nanomachines to go airbornes and kill anything not matching his DNA.



* A variation of this occurred in ''VideoGame/HorizonZeroDawn'' - [[spoiler:a line of robotic soldiers that consumed biomass as fuel (supposed to only be in emergency situations) and could self-replicate was one day stricken with a glitch that made them ignore all commands and go rogue, and due to their highly advanced coding and the fact that the CEO of the company that created them [[LethallyStupid specifically told the engineers to not install a backdoor]], it was nigh-unstoppable and these rogue robotic soldiers consumed '''all organic life on the planet''' in less than two years. The title is derived from the in universe project meant to not only shut the rogue bots down, but to also bring life back to Earth through a highly advanced AI system.]]
** [[spoiler:How did the aforementioned bots consume their biomass?]] [[spoiler:They had nanites of their own, which stripped the biomass and carried it back to the bot. And sometimes they targeted ''humans''.]]



* One of the possible upgrades for your Alchemy Labs in ''VideoGame/CookieClicker'' is called "Beige Goo" According to the description, it turned three whole ''galaxies'' into cookies.
** If you bake enough cookies, the news blurb claims that the universe itself has turned into cookies to the molecular level.
* The ''VideoGame/GodEater'' series has Oracle Cells, single-celled organisms that seek out and consume compatible matter to grow and evolve. What matter is "compatible" differs on a cell-by-cell basis known as "bias factor", and everything on Earth is accounted for (except, oddly, water). It's not just a gooey tidal wave though: when a cluster of Oracle Cells can get a pile of the right compatibility to form, you get an Aragami, a monster who goes around eating matter to distribute it to its constituent cells (which are ''still'' trying to consume each other, resulting in a constantly-evolving beast). Pretty much the only reason humanity hasn't been wiped out completely yet is because these Aragami try to out-Darwin each other just as much as going after raw material, but [[BigGood Fenrir]] is still in a race against time against a nightmare scenario of an Aragami capable of adsorbing all others forming. So far they've only been able to delay this, by having their God Eaters destroy the core cells, causing all Oracle Cells in an Aragami to lose cohesion and start from scratch.
* ''[[Videogame/AIWarFleetCommand AI War 2]]:'' The appropriately-named Nanocaust is a nanite plague capable of infecting and spreading from spaceship to spaceship like a plague, and forming hives upon planets to consume everything in them for the purpose of more reproduction and consumption. It's unknown where it came from (both aliens and renegade humans are suspected), but even the AI has problems handling it; the description mentions it's the sort of rampaging threat that usually keeps it busy outside the galaxy with its back turned to you.

to:

* One The TrueFinalBoss of ''VideoGame/SuperRobotWarsOriginalGeneration'', [[spoiler: Septuagint]], can be seen as this. It may be more of [[spoiler: purple crystals]], but its directive is clear: exterminate the whole world by consuming anything to come to its path, and it can even make [[spoiler: crystal-based]] duplicates of things it has consumed.
* A grey goo like attack is
possible upgrades for your Alchemy Labs in ''VideoGame/CookieClicker'' is ''VideoGame/SupremeCommander2''. The Cybran Nation can upgrade their engineers to have weapons, by doing this and building nothing but engineers you will get an ever growing blob of engineers that will automatically shoot every enemy in sight and use the remains to build more engineers. [[http://www.pcgamer.com/2010/06/20/engineering-victory-in-supreme-commander-2/ Full instructions here]].
* Grey goo missiles
called "Beige Goo" According to the description, it turned three whole ''galaxies'' into cookies.
** If
"Nano Virus" are a high-level planetary siege weapon in ''VideoGame/SwordOfTheStars''. It is amusingly classified as a bio-weapon, meaning you bake enough cookies, have to go through several tiers worth of gene modification to access it. The Nano Virus is harmless to organics, but the news blurb claims planet's industrial output will be heavily damaged and it will wipe out an AI rebellion as if they were living creatures hit by a regular bio weapon. It is the only bio weapon that will affect the universe itself has turned into cookies to Zuul, since their machinery is made of the molecular level.
same metal as everyone else's.
* The ''VideoGame/GodEater'' series has Oracle Cells, single-celled organisms that seek out ''VideoGame/TastyPlanet'' is a game based on Grey Goo where a cleaning agent gets bigger and consume compatible matter to grow and evolve. What matter is "compatible" differs bigger as you guide it through the levels starting on a cell-by-cell basis known as "bias factor", Petri Dish until it eats the planet, then the solar system, galaxy, universe, space and time! [[spoiler:Then it explodes and everything on Earth is accounted for (except, oddly, water). It's not just a gooey tidal wave though: when a cluster of Oracle Cells can get a pile of the right compatibility to form, you get an Aragami, a monster who goes around eating matter to distribute it to its constituent cells (which are ''still'' trying to consume each other, resulting in a constantly-evolving beast). Pretty much the only reason humanity hasn't been wiped out completely yet is because these Aragami try to out-Darwin each other just as much as going after raw material, but [[BigGood Fenrir]] is still in a race against time against a nightmare scenario of an Aragami capable of adsorbing all others forming. So far they've only been able to delay this, by having their God Eaters destroy the core cells, causing all Oracle Cells in an Aragami to lose cohesion and start from scratch.
* ''[[Videogame/AIWarFleetCommand AI War 2]]:'' The appropriately-named Nanocaust is a nanite plague capable of infecting and spreading from spaceship to spaceship like a plague, and forming hives upon planets to consume everything in them for the purpose of more reproduction and consumption. It's unknown where it came from (both aliens and renegade humans are suspected), but even the AI has problems handling it; the description mentions it's the sort of rampaging threat that usually keeps it busy outside the galaxy with its back turned to you.
starts over.]]



* ''VideoGame/{{Brawlhalla}}'' in the backstory of Barraza, it's described how [[MegaCorp Meyer's Baby Food Corporation]] attempted a desperate move on a rogue agent's hideout by deploying a self-replicating nanobot cloud on them. These nanobots bricked anything that relied on computer circuitry... which in 2150 was ''everything''. The nanobots were supposed to go inert after 20 minutes, but for some reason they didn't. The end result was the Mad Max-esque post-apocalypse world that Barraza comes from.

to:

* ''VideoGame/{{Brawlhalla}}'' in The EldritchAbomination Deus from ''VideoGame/{{Xenogears}}'' is upgraded from a simple biological weapon into a living mass of Grey Goo by the backstory of Barraza, it's described how [[MegaCorp Meyer's Baby Food Corporation]] attempted a desperate move on a rogue agent's hideout by deploying a self-replicating nanobot cloud on them. These nanobots bricked anything that relied on computer circuitry... which in 2150 was ''everything''. The nanobots were supposed to go inert after 20 minutes, but for some reason they didn't. The end result was the Mad Max-esque post-apocalypse world that Barraza comes from.game's BigBad Krelian through nanomachines.



[[folder:Web Comics]]
* ''Webcomic/{{xkcd}}'':
** [[http://xkcd.com/865/ This]] page jokes about how [=IPv6=] is perfect in that the nanobots will only be able to devour about half the planet before they run out of addresses.
** [[https://xkcd.com/1242/ Another comic on "Scary Names"]] noted "Grey Goo" might not sound scary, but is something as terrifying as "Bird flu" and [[https://en.wikipedia.org/wiki/Demon_core "Demon core."]]

to:

[[folder:Web Comics]]
[[folder:Webcomics]]
* ''Webcomic/{{xkcd}}'':
** [[http://xkcd.com/865/ This]] page jokes about how [=IPv6=]
''Webcomic/TwentyFirstCenturyFox'' points out the concept is perfect in actually kind of stupid [[http://techfox.comicgenesis.com/d/20100419.html here.]]
-->"You know, if the people who think
that the nanobots ''self replicating nanites'' will only be able to devour about half accidentally escape from ''ideal, sterile laboratory conditions'' and turn Earth , from the planet before they run out ''tropics'' to the ''Arctic'', from the oceans to the ''deserts'', into '''a glob of addresses.
** [[https://xkcd.com/1242/ Another comic on "Scary Names"]] noted "Grey Goo" might not sound scary, but is something
grey goo''', ever read the instructions of a packet of seeds, they'd all sleep better at night."
* In ''Webcomic/{{Freefall}}'', Dr. Bowman [[http://freefall.purrsia.com/ff2600/fc02537.htm points out]] that if robots have human desires
as terrifying as "Bird flu" their sole and [[https://en.wikipedia.org/wiki/Demon_core "Demon core."]]singular goal, as well as the ability to reproduce, then what you wind up with isn't too far off from grey goo.
-->'''Dr. Bowman:''' Good news if you're a human. Bad news if you're anything else.
* ''Webcomic/NobodyScores'': When all you have is a jar of nanorobots, [[http://nobodyscores.loosenutstudio.com/index.php?id=56 everything looks like a problem best solved by the application of nanorobots.]]



* ''Webcomic/NobodyScores'': When all you have is a jar of nanorobots, [[http://nobodyscores.loosenutstudio.com/index.php?id=56 everything looks like a problem best solved by the application of nanorobots.]]
* ''Webcomic/TwentyFirstCenturyFox'' points out the concept is actually kind of stupid [[http://techfox.comicgenesis.com/d/20100419.html here.]]
-->"You know, if the people who think that ''self replicating nanites'' will accidentally escape from ''ideal, sterile laboratory conditions'' and turn Earth , from the ''tropics'' to the ''Arctic'', from the oceans to the ''deserts'', into '''a glob of grey goo''', ever read the instructions of a packet of seeds, they'd all sleep better at night."
* In ''Webcomic/{{Freefall}}'', Dr. Bowman [[http://freefall.purrsia.com/ff2600/fc02537.htm points out]] that if robots have human desires as their sole and singular goal, as well as the ability to reproduce, then what you wind up with isn't too far off from grey goo.
-->'''Dr. Bowman:''' Good news if you're a human. Bad news if you're anything else.



* ''Webcomic/{{xkcd}}'':
** [[http://xkcd.com/865/ This]] page jokes about how [=IPv6=] is perfect in that the nanobots will only be able to devour about half the planet before they run out of addresses.
** [[https://xkcd.com/1242/ Another comic on "Scary Names"]] noted "Grey Goo" might not sound scary, but is something as terrifying as "Bird flu" and [[https://en.wikipedia.org/wiki/Demon_core "Demon core."]]



* In WesternAnimation/{{Ben 10}}, this is the origin of the Galvanic Mechamorph's (Upgrade's species).
* ''WesternAnimation/CodeLyoko''
** In the episode "Marabounta", Jeremie tried to create a virus that would destroy XANA's monsters, using [[BigGood Franz's Hopper's]] journal and basing it off African army ants. At first the huge blob-like monster seemed to work, attacking and devouring XANA's minions. Then something went wrong, and it tried to attack Aelita. Jeremie realized too late that her connection to XANA was causing it to mistake her for one of the monsters, but by then it was out of control and growing larger by the minute, threatening to consume all of Lyoko. (Leading to one of the most chilling scenes of the series to date, Yumi trying to protect Aelita, only to be devirtualized when she was EatenAlive by the thing.) Fortunately, XANA, who at that point needed Aelita alive to complete his plans, [[EnemyMine instructed his monsters to help the heroes]], and due to the brief alliance, they bought enough time for Jeremie to program an anti-virus that eradicated it.
** An earlier episode "Amnesia", had [[AIIsACrapshoot XANA]] infecting nanobots from a class as an infestation to cause massive amounts of memory loss.
* Parodied in ''WesternAnimation/{{Futurama}}'' episode "[[Recap/FuturamaS6E17Benderama Benderama]]", thanks to an invention of the professor's that can make two half-sized duplicates of an object using consumed matter. Bender integrates the device into himself and starts making half-sized duplicates of himself by eating random objects. Each of the duplicates has the same ability. Eventually the replica-Benders become small enough to manipulate atoms directly and start consuming the planet's mass. Eventually, though, the quintillions of nano-Benders get fed up with doing work for Bender and leave the planet. At one point in the episode, Bender says the trope name word-for-word.
* In the ''WesternAnimation/{{Gargoyles}}'' episode, "Walkabout," an artificially intelligent nanite mass begins a grey goo surge and the only way to stop it is to communicate with it in the Dreamtime. Once that was achieved, the mass was convinced to stop by interesting it in learning about human law and order and it bonded with Dingo's power armor for that purpose.



* In the ''WesternAnimation/MyLifeAsATeenageRobot'' episode "Party Machine", an army of tiny multiplying aliens invade Earth, which Jenny and Brad defeat with a vacuum cleaner-like tool created by Dr. Wakeman to defeat them.
* ''WesternAnimation/ThePowerpuffGirls'': "Nano of the North" features a swarm of Grey Goo nanobots dropping from a raincloud and destroying Townsville, though the bots thankfully ignored living creatures. Since the girls are too big to fight them (it only ends up with them eating their clothes) they are shrunk to their level to fight. When they are overpowered by the girls, the nanobots fuse into a relatively-HumongousMecha... which is just as big as an insect, [[ClippedWingAngel allowing Professor Utonium to crush it under his foot]].



* In WesternAnimation/{{Ben 10}}, this is the origin of the Galvanic Mechamorph's (Upgrade's species).
* ''WesternAnimation/ThePowerpuffGirls'': "Nano of the North" features a swarm of Grey Goo nanobots dropping from a raincloud and destroying Townsville, though the bots thankfully ignored living creatures. Since the girls are too big to fight them (it only ends up with them eating their clothes) they are shrunk to their level to fight. When they are overpowered by the girls, the nanobots fuse into a relatively-HumongousMecha... which is just as big as an insect, [[ClippedWingAngel allowing Professor Utonium to crush it under his foot]].
* ''WesternAnimation/CodeLyoko''
** In the episode "Marabounta", Jeremie tried to create a virus that would destroy XANA's monsters, using [[BigGood Franz's Hopper's]] journal and basing it off African army ants. At first the huge blob-like monster seemed to work, attacking and devouring XANA's minions. Then something went wrong, and it tried to attack Aelita. Jeremie realized too late that her connection to XANA was causing it to mistake her for one of the monsters, but by then it was out of control and growing larger by the minute, threatening to consume all of Lyoko. (Leading to one of the most chilling scenes of the series to date, Yumi trying to protect Aelita, only to be devirtualized when she was EatenAlive by the thing.) Fortunately, XANA, who at that point needed Aelita alive to complete his plans, [[EnemyMine instructed his monsters to help the heroes]], and due to the brief alliance, they bought enough time for Jeremie to program an anti-virus that eradicated it.
** An earlier episode "Amnesia", had [[AIIsACrapshoot XANA]] infecting nanobots from a class as an infestation to cause massive amounts of memory loss.
* In the ''WesternAnimation/{{Gargoyles}}'' episode, "Walkabout," an artificially intelligent nanite mass begins a grey goo surge and the only way to stop it is to communicate with it in the Dreamtime. Once that was achieved, the mass was convinced to stop by interesting it in learning about human law and order and it bonded with Dingo's power armor for that purpose.
* Parodied in ''WesternAnimation/{{Futurama}}'' episode "[[Recap/FuturamaS6E17Benderama Benderama]]", thanks to an invention of the professor's that can make two half-sized duplicates of an object using consumed matter. Bender integrates the device into himself and starts making half-sized duplicates of himself by eating random objects. Each of the duplicates has the same ability. Eventually the replica-Benders become small enough to manipulate atoms directly and start consuming the planet's mass. Eventually, though, the quintillions of nano-Benders get fed up with doing work for Bender and leave the planet. At one point in the episode, Bender says the trope name word-for-word.
* In the ''WesternAnimation/MyLifeAsATeenageRobot'' episode "Party Machine", an army of tiny multiplying aliens invade Earth, which Jenny and Brad defeat with a vacuum cleaner-like tool created by Dr. Wakeman to defeat them.


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%% Image selected per Image Pickin' thread: https://tvtropes.org/pmwiki/posts.php?discussion=1379261033074475900
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* The titular creatures in ''Manga/{{BioMeat|Nectar}}''.



* The ''WORMS'' in ''Anime/SkyGirls'' are related to this. Sort of.

to:

* The ''WORMS'' title creatures in ''Anime/SkyGirls'' are related ''Manga/{{BioMeat|Nectar}}''.
* The [[BigBad D-Reaper]] from ''Anime/DigimonTamers'' is a very slow form of Grey Goo, breaking down inorganic matter and reconfigure it into its various agents once it emerges in the real world. It's depicted as a mass of ''red'' goo in the series because its actually super-heated
to this. Sort of.extreme temperatures by accelerating its particles [[ArtisticLicensePhysics beyond the speed of light]].
* The culture fluid from ''Anime/DragonBallZBioBroly'' multiplies when it absorbs a person, the stronger, the better. After absorbing Bio-Broly it expands to cover the whole island but luckily seawater turns it to stone.



* The [[BigBad D-Reaper]] from ''Anime/DigimonTamers'' is a very slow form of Grey Goo, breaking down inorganic matter and reconfigure it into its various agents once it emerges in the real world. It's depicted as a mass of ''red'' goo in the series because its actually super-heated to extreme temperatures by accelerating its particles [[ArtisticLicensePhysics beyond the speed of light]].
* The culture fluid from ''Anime/DragonBallZBioBroly'' multiplies when it absorbs a person, the stronger, the better. After absorbing Bio-Broly it expands to cover the whole island but luckily seawater turns it to stone.

to:

* The [[BigBad D-Reaper]] from ''Anime/DigimonTamers'' is a very slow form of Grey Goo, breaking down inorganic matter and reconfigure it into its various agents once it emerges ''WORMS'' in the real world. It's depicted as a mass of ''red'' goo in the series because its actually super-heated ''Anime/SkyGirls'' are related to extreme temperatures by accelerating its particles [[ArtisticLicensePhysics beyond the speed of light]].
* The culture fluid from ''Anime/DragonBallZBioBroly'' multiplies when it absorbs a person, the stronger, the better. After absorbing Bio-Broly it expands to cover the whole island but luckily seawater turns it to stone.
this. Sort of.



* In ''Comicbook/AtomicRobo'', Biomega (the setting's resident {{Kaiju}}) turn out to be a biological form of this. If left unchecked, they will eventually devour the Earth, then the solar system, the galaxy, other galaxies...



* Adam Warren's adaptation of the ''ComicBook/DirtyPair'' revealed that the Earth had been destroyed decades earlier in a massive Grey Goo outbreak, the "Nanoclysm", which led to nanotechnology being regulated and virtually outlawed. The villain of the miniseries planned to use a cache of nanotech to take over HeroesRUs's Central Computer, and from there, the known universe. [[spoiler:Unfortunately, the Central Computer revealed that it was partially based on something the Nanoclysm left humanity as an apology…]] His later ''{{ComicBook/Empowered}}'' had a Grey Goo eruption that created {{Sexbot}}s, for reasons too complicated and silly to explain but which involved someone trying to use alien nanobots with an untranslated interface for perverse purposes.

to:

* Adam Warren's adaptation of the ''ComicBook/DirtyPair'' revealed that the Earth had been destroyed decades earlier in a massive Grey Goo outbreak, the "Nanoclysm", which led to nanotechnology being regulated and virtually outlawed. The villain of the miniseries planned to use a cache of nanotech to take over HeroesRUs's Central Computer, and from there, the known universe. [[spoiler:Unfortunately, the Central Computer revealed that it was partially based on something the Nanoclysm left humanity as an apology…]] His later apology…]]
*
''{{ComicBook/Empowered}}'' had has a Grey Goo eruption that created {{Sexbot}}s, for reasons too complicated and silly to explain but which involved someone trying to use alien nanobots with an untranslated interface for perverse purposes.purposes.
* One issue of ''ComicBook/FantasticFour'' claimed that the reason [[ReedRichardsIsUseless Reed has never tried to market]] the unstable molecules the team's suits are made out of is that if a careless person gets ahold of the stuff and pokes it the wrong way with an electron microscope, it starts destabilizing all surrounding matter into an ever-expanding blob of goo. Naturally in that issue [[BodyHorror someone careless got ahold of the stuff]].



* ''Comicbook/IronMan'''s Technovore is a nanotechnological entity driven to assimilate and integrate foreign technology into itself.
* One of the early comic issues of ''Magazine/{{MAD}}'' had the planet Mars consumed by the Gookum, a jelly-like pink substance which eats anything organic. It breaches TheGreatWall built to contain it, and, worse, ItCanThink. It stays dormant for 500 years at a time, and the joke/Mandatory Pulp Sci-Fi Twist is that cherry Jello parfait is completely indistinguishable from dormant Gookum. One day... one day the Gookum will quiver, will stir...



* One of the early comic issues of ''Magazine/{{MAD}}'' had the planet Mars consumed by the Gookum, a jelly-like pink substance which eats anything organic. It breaches TheGreatWall built to contain it, and, worse, ItCanThink. It stays dormant for 500 years at a time, and the joke/Mandatory Pulp Sci-Fi Twist is that cherry Jello parfait is completely indistinguishable from dormant Gookum. One day... one day the Gookum will quiver, will stir...
* One issue of ''ComicBook/FantasticFour'' claimed that the reason [[ReedRichardsIsUseless Reed has never tried to market]] the unstable molecules the team's suits are made out of is that if a careless person gets ahold of the stuff and pokes it the wrong way with an electron microscope, it starts destabilizing all surrounding matter into an ever-expanding blob of goo. Naturally in that issue [[BodyHorror someone careless got ahold of the stuff]].
* ''Comicbook/IronMan'''s Technovore is a nanotechnological entity driven to assimilate and integrate foreign technology into itself.
* In ''Comicbook/AtomicRobo'', Biomega (the setting's resident {{Kaiju}}) turn out to be a biological form of this. If left unchecked, they will eventually devour the Earth, then the solar system, the galaxy, other galaxies...



* Hermione Granger ''Fanfic/TheArithmancer'' realises that it's possible for a combination of transfiguration and runic magic to create a self-replicating swarm, and promptly freaks out until she examines the problem more carefully and decides that it would be very hard to ''accidentally'' create a self-sustaining swarm; most configurations would eventually degrade and/or run out of power. [[spoiler: She does create a carefully limited swarm for herself as a last-ditch weapon, and uses it to kill Bellatrix Lestrange.]]



* Hermione Granger ''Fanfic/TheArithmancer'' realises that it's possible for a combination of transfiguration and runic magic to create a self-replicating swarm, and promptly freaks out until she examines the problem more carefully and decides that it would be very hard to ''accidentally'' create a self-sustaining swarm; most configurations would eventually degrade and/or run out of power. [[spoiler: She does create a carefully limited swarm for herself as a last-ditch weapon, and uses it to kill Bellatrix Lestrange.]]



* ''Film/TheDayTheEarthStoodStill2008'' tries to reboot the Earth with this. It was more a "Grey Cloud" than Goo, but same strategy.
* ''Film/GIJoeTheRiseOfCobra'' had "Red[=/=]Black" weaponized Goo (which is [[SicklyGreenGlow green for the viewer's convenience]]), which ate any metal it came into contact with. Thankfully, the designers were smart enough to build them with cutoff switches which neutralized them instantly. It also had a limited life span which meant that if its food source was too far away it would die out, depending on how much of a start it got. Eating the Eiffel Tower would give it enough of a start to devour all of Paris, but it would likely not reach another city. Devour [[spoiler: a single ship high in the stratosphere]] and it dies out long before it reaches anything else. It's unlikely that the nanomites were self-replicating at all. A self-replicating nanomachine is, by necessity, much more complex that a simple molecular disassembler. And if you're foresighted enough to build in a kill-switch, the very last thing you'd want to risk is the possibility of generational copying errors disabling that function.



* ''Film/TheDayTheEarthStoodStill2008'' tries to reboot the Earth with this. It was more a "Grey Cloud" than Goo, but same strategy.
* ''Film/GIJoeTheRiseOfCobra'' had "Red[=/=]Black" weaponized Goo (which is [[SicklyGreenGlow green for the viewer's convenience]]), which ate any metal it came into contact with. Thankfully, the designers were smart enough to build them with cutoff switches which neutralized them instantly. It also had a limited life span which meant that if its food source was too far away it would die out, depending on how much of a start it got. Eating the Eiffel Tower would give it enough of a start to devour all of Paris, but it would likely not reach another city. Devour [[spoiler: a single ship high in the stratosphere]] and it dies out long before it reaches anything else. It's unlikely that the nanomites were self-replicating at all. A self-replicating nanomachine is, by necessity, much more complex that a simple molecular disassembler. And if you're foresighted enough to build in a kill-switch, the very last thing you'd want to risk is the possibility of generational copying errors disabling that function.



* In ''Film/SupermanReturns'', Lex Luthor creates a Kryptonian island that will grow over America if not stopped. The novelization and ComicBookAdaptation imply that it's growing into a planet after Superman pushes it into space.



* In ''Film/SupermanReturns'', Lex Luthor creates a Kryptonian island that will grow over America if not stopped. The novelization and ComicBookAdaptation imply that it's growing into a planet after Superman pushes it into space.



* An über-example would be Charles Stross' ''Literature/{{Accelerando}}'', where pretty much the same events as in ''Bloom'' happen ''deliberately, and for the betterment of mankind''.
* ''Literature/{{Aeon 14}}'': Nanotechnology is common in the series and nanotech weapons easily combated. However the picotechnology mastered by scientists aboard the colony ship ''Intrepid'' is potentially very dangerous: the Intrepid Space Force under Tanis Richards successfully uses picobombs several times against opposing ships, but there are reports of people trying to replicate the weapons and getting entire planetary civilizations eaten for their troubles (or killed by OrbitalBombardment when the Orion Guard gets wind of the experiments, in the case of the birth family of Tanis's adopted daughter Sanavi).
* In Creator/WalterJonWilliams's ''Literature/{{Aristoi}}'', a form of grey goo (called "mataglap nano") destroyed EarthThatWas. As a result, only the eponymous Aristoi are legally allowed to use nanotech freely and they are fanatically paranoid about the possibility that any given form of nanotech could somehow mutate into mataglap.
* In Creator/GregBear's ''Literature/BloodMusic'', the Green Goo is not nanotechnology, but biotechnology, but operates in basically the same fashion. The "noocytes" consume all the biomass in North America, converting it to more noocytes. [[spoiler: It turns out that all the living creatures who are assimilated are also recorded and "alive" in a new kind of reality, similar to "Bloom" below.]]
* One of the best examples is Wil [=McCarthy=]'s ''Bloom'', a novel set in a future where the last fragments of humanity lives in habitats in the asteroid belt and in jovian orbit, after the entire inner solar system was devoured in a Grey Goo incident. Earth, Venus, and Mars are now large fuzzy balls of nanotech, nanotech solar sails drift aimlessly throughout the system, and occasionally errant strands drift out on the solar winds and try to devour anything they touch in the outer solar system. [[spoiler:It's okay, though, because the billions of people devoured in the incident are merely compressed, not gone, and their brain engrams still survive in the bloom, immortal and living in virtual paradises of their own construction; imagine how powerful a computer would be if it was made from an entire solar system?]]
* Hal Duncan's ''Literature/TheBookOfAllHours'' has {{Magitek}} nanites charged with the souls of dead gods. It's an ideal medium for carving new identities on people's minds and souls by tattooing their bodies. A large collection also gets loose at the end of the first book, leading to a Grey Goo scenario that gnaws at the very substance of reality. All that's left are pockets of semi-stable time and [[TheoryOfNarrativeCausality narrative]] as spacetime [[TimeyWimeyBall gets even more fractured than it already was]].



** Reynolds likes this trope. In his Literature/{{Revelation Space|Series}} universe [[spoiler:the humans finally wipe out the all-destroying robot race that's been killing all the spacefaring races - only to discover they were keeping in check a ''much worse'' all-destroying robot race: out-of-control terraformers called Greenfly. They were programmed to convert matter and energy into vegetable-rich biospheres, and they're doing it with enthusiasm - with ''all'' the matter and energy. They end up driving the remnants of humanity out of the Milky Way altogether, and may or may not eventually go on to consume the entire universe.]]
* One of the best examples is Wil [=McCarthy=]'s ''Bloom'', a novel set in a future where the last fragments of humanity lives in habitats in the asteroid belt and in jovian orbit, after the entire inner solar system was devoured in a Grey Goo incident. Earth, Venus, and Mars are now large fuzzy balls of nanotech, nanotech solar sails drift aimlessly throughout the system, and occasionally errant strands drift out on the solar winds and try to devour anything they touch in the outer solar system. [[spoiler:It's okay, though, because the billions of people devoured in the incident are merely compressed, not gone, and their brain engrams still survive in the bloom, immortal and living in virtual paradises of their own construction; imagine how powerful a computer would be if it was made from an entire solar system?]]
* Another über-example would be Charles Stross' ''Literature/{{Accelerando}}'', where pretty much the same events as in ''Bloom'' happened ''deliberately, and for the betterment of mankind''.
* The novel ''How to Mutate and Take Over the World'' ends with [[spoiler:nanites from a dessert factory transforming the world into key lime pie. And this gets spoiled about a third of the way in, [[NoFourthWall in a fictional review of the book]]]].
* In one of the ''Literature/ThursdayNext'' novels, Thursday's time-traveling father tells her of a future wherein the world was overtaken by such a scenario; the world is consumed by pink slime. [[spoiler:It turns out to be strawberry pudding.]]

to:

** Reynolds likes this trope. * In his Literature/{{Revelation Space|Series}} universe [[spoiler:the humans finally wipe out the all-destroying robot race that's been killing all the spacefaring races - only to discover they were keeping in check a ''much worse'' all-destroying robot race: out-of-control terraformers called Greenfly. They were programmed to convert matter and energy into vegetable-rich biospheres, and they're doing it with enthusiasm - with ''all'' the matter and energy. They end up driving the remnants of humanity out of the Milky Way altogether, and may or may not eventually go on to consume the entire universe.]]
* One of the best examples
Creator/JackMcDevitt's ''[[Literature/PriscillaHutchins Chindi]]'', an ancient alien satellite that has already mysteriously destroyed one ship is Wil [=McCarthy=]'s ''Bloom'', a novel set in a future where the last fragments of humanity lives in habitats in the asteroid belt and in jovian orbit, after the entire inner solar system was devoured in a Grey Goo incident. Earth, Venus, and Mars are now large fuzzy balls of nanotech, nanotech solar sails drift aimlessly throughout the system, and occasionally errant strands drift out on the solar winds and try to devour anything they touch in the outer solar system. [[spoiler:It's okay, though, because the billions of people devoured in the incident are merely compressed, not gone, and their brain engrams still survive in the bloom, immortal and living in virtual paradises of their own construction; imagine how powerful a computer would be if it was made from an entire solar system?]]
* Another über-example would be Charles Stross' ''Literature/{{Accelerando}}'', where pretty
being much more carefully investigated by a second when the same events as in ''Bloom'' happened ''deliberately, and for the betterment of mankind''.
* The novel ''How
ship begins to Mutate and Take Over the World'' ends with [[spoiler:nanites from a dessert factory transforming the world into key lime pie. And this gets spoiled about a third of the way in, [[NoFourthWall in a fictional review of the book]]]].
* In one of the ''Literature/ThursdayNext'' novels, Thursday's time-traveling father tells her of a future wherein the world was overtaken by such a scenario; the world is consumed by pink slime. [[spoiler:It
come apart. It turns out that the satellite uses grey goo to repair/replicate itself, and the ship is being eaten. Several people die, and one, the artist with a big crush on Hutch, is rescued just in the nick of time.
* The title ExtremeOmnivore BlobMonster in the ''Literature/TheClone'' has some shades of this, although it's green and not grey. Nearly everything it touches, organic and ''in''organic, it converts directly into more of its own body mass.
* In Creator/JohnCWright's ''Literature/CountToTheEschaton'', the Savants used Golden Goo. It destroyed the cities, where it was released first -- killing most people there, with only a few stunned
to be strawberry pudding.]]transferred with their minds intact -- and only by savage, fiery attack by the Giants was the earth saved from their "Golden Age."



* In ''Literature/DeltoraQuest'', [[spoiler: the Shadow Lord has a literal grey goo flood set up as a final XanatosGambit.]] It was designed to [[spoiler: kill everything on the continent,]] but [[spoiler: the Shadow Lord didn't count on [[SpannerInTheWorks dragons]].]]
* Played with in ''Literature/TheDervishHouse'' by Creator/IanMcDonald. The Grey Goo scenario is a common fear in the near-future setting due to a famous scientist's doomsday predictions of a nanotech catastrophe, even though it's generally accepted that he was just fearmongering and was wrong. A character later comments that the Grey Goo scenario ''has already happened''; it's called organic life. It turns out that [[spoiler:self-replicating nanotechnology is key to a massive terrorist attack, but not in the traditional sense]].
* In ''The Forge of God'' by Creator/GregBear, this is done deliberately and systematically by a belligerent alien race, to humanity as well as at least one other race. The sequel, ''Anvil of Stars'', is the story of a handful of the survivors of Earth -- specifically, the children -- seeking out the race that destroyed Earth, to enact [[EarthShatteringKaboom the Law]].
* ''Literature/TheFourHorsemenUniverse'': The BountyHunter protagonist of the ShortStory "The Last Guardsman" is mortally wounded when his quarry wings him with a [[AbnormalAmmo grey goo bullet]] that eats him alive from the inside out.
* The novel ''How to Mutate and Take Over the World'' ends with [[spoiler:nanites from a dessert factory transforming the world into key lime pie. And this gets spoiled about a third of the way in, [[NoFourthWall in a fictional review of the book]]]].
* Charles Pellegrino and George Zebrowski's ''Literature/TheKillingStar'' includes weaponized Grey Goo which is used to [[spoiler:pick off one of the few surviving outposts of humanity.]]
* In ''[[Literature/TheLongEarth The Long Cosmos]]'', one of the parallel Earths has been entirely devastated by a matter replicator run amok. The matter replicator was originally supposed to absorb enough vegetable matter to produce a book of the complete works of Shakespeare, but once a glitch caused it to produce another replicator just like it... which in turn produced other replicators. It did not help that the replicator owner, who was only concerned with spreading the knowledge of Shakespeare across the parallel Earths, completely failed to anticipate the dangers of a rogue self-replicating machine let loose on a planet.
* In the short story "[[http://clarkesworldmagazine.com/mellor_09_13/ Mar Pacifico]]" by Greg Mellor, nanotech designed to fight the effects of global warming (by letting the oceans absorb more carbon) sweeps over the Earth absorbing most forms of life. [[spoiler:When the protagonist is absorbed, she discovers that humanity still exists as a linked HiveMind inside the nanotech.]]



* In the ''Literature/{{Revelation Space|Series}}'' universe [[spoiler:the humans finally wipe out the all-destroying robot race that's been killing all the spacefaring races - only to discover they were keeping in check a ''much worse'' all-destroying robot race: out-of-control terraformers called Greenfly. They were programmed to convert matter and energy into vegetable-rich biospheres, and they're doing it with enthusiasm - with ''all'' the matter and energy. They end up driving the remnants of humanity out of the Milky Way altogether, and may or may not eventually go on to consume the entire universe.]]



* Discussed derisively in ''Literature/SchildsLadder'', which is set in a post-[[TheSingularity Singularity]] galactic society: an AI character mentions the conspiracy theory that [[TheMetaverse metaverse]]-dwelling minds would assimilate planets for computational resources, calling it as preposterous as accusing organic beings of plotting to turn the world into chocolate for infinite desserts.
* In ''Literature/SpyGearAdventures'', this is the focus of the fourth book, ''The Doomsday Dust'', and [[MrExposition Cyril]] explains the trope by name to the others.
* In SA Swann's ''Literature/TerranConfederacy'' universe, the human colonies on Titan and the outer moons were devoured by a Grey Goo swarm, leading to Main/{{Nanomachines}} being made one of the Heretical Technologies. The Confederacy and its successor states continued this policy, enforcing it with things like [[ColonyDrop hundred kilometer asteroids]]. ItsTheOnlyWayToBeSure!
* In one of the ''Literature/ThursdayNext'' novels, Thursday's time-traveling father tells her of a future wherein the world was overtaken by such a scenario; the world is consumed by pink slime. [[spoiler:It turns out to be strawberry pudding.]]



* Charles Pellegrino and George Zebrowski's ''Literature/TheKillingStar'' includes weaponized Grey Goo which is used to [[spoiler:pick off one of the few surviving outposts of humanity.]]
* Creator/GregBear:
** In ''The Forge of God'', this is done deliberately and systematically by a belligerent alien race, to humanity as well as at least one other race. The sequel, ''Anvil of Stars'', is the story of a handful of the survivors of Earth -- specifically, the children -- seeking out the race that destroyed Earth, to enact [[EarthShatteringKaboom the Law]].
** In Greg's ''Literature/BloodMusic'', the Green Goo is not nanotechnology, but biotechnology, but operates in basically the same fashion. The "noocytes" consume all the biomass in North America, converting it to more noocytes. [[spoiler: It turns out that all the living creatures who are assimilated are also recorded and "alive" in a new kind of reality, similar to "Bloom" above.]]
* Played with in ''TheDervishHouse'' by Creator/IanMcDonald. The Grey Goo scenario is a common fear in the near-future setting due to a famous scientist's doomsday predictions of a nanotech catastrophe, even though it's generally accepted that he was just fearmongering and was wrong. A character later comments that the Grey Goo scenario ''has already happened''; it's called organic life. It turns out that [[spoiler:self-replicating nanotechnology is key to a massive terrorist attack, but not in the traditional sense]].
* In ''Literature/DeltoraQuest'', [[spoiler: the Shadow Lord has a literal grey goo flood set up as a final XanatosGambit.]] It was designed to [[spoiler: kill everything on the continent,]] but [[spoiler: the Shadow Lord didn't count on [[SpannerInTheWorks dragons]].]]
* In the ''Franchise/StarWars'' RPG supplement ''The Unknown Regions'', a Grey Goo named Mnggal-Mnggal is mentioned. It is sentient, and able to infect any form of matter, as well as take control of creatures as 'zombies'. Its origins are unknown, and it's likely biological. Note: If there was a trope for biological Grey Goo Mnggal-Mnggal would fit there.
* In Creator/JackMcDevitt's ''[[Literature/PriscillaHutchins Chindi]]'', an ancient alien satellite that has already mysteriously destroyed one ship is being much more carefully investigated by a second when the ship begins to come apart. It turns out that the satellite uses grey goo to repair/replicate itself, and the ship is being eaten. Several people die, and one, the artist with a big crush on Hutch, is rescued just in the nick of time.
* In Creator/JohnCWright's ''Literature/CountToTheEschaton'', the Savants used Golden Goo. It destroyed the cities, where it was released first -- killing most people there, with only a few stunned to be transferred with their minds intact -- and only by savage, fiery attack by the Giants was the earth saved from their "Golden Age."
* In Creator/WalterJonWilliams's ''Literature/{{Aristoi}}'', a form of grey goo (called "mataglap nano") destroyed EarthThatWas. As a result, only the eponymous Aristoi are legally allowed to use nanotech freely and they are fanatically paranoid about the possibility that any given form of nanotech could somehow mutate into mataglap.
* In the short story ''[[http://clarkesworldmagazine.com/mellor_09_13/ Mar Pacifico]]'' by Greg Mellor, nanotech designed to fight the effects of global warming (by letting the oceans absorb more carbon) sweeps over the Earth absorbing most forms of life. [[spoiler:When the protagonist is absorbed, she discovers that humanity still exists as a linked HiveMind inside the nanotech.]]
* In SA Swann's Literature/TerranConfederacy universe, the human colonies on Titan and the outer moons were devoured by a Grey Goo swarm, leading to Main/{{Nanomachines}} being made one of the Heretical Technologies. The Confederacy and its successor states continued this policy, enforcing it with things like [[ColonyDrop hundred kilometer asteroids]]. ItsTheOnlyWayToBeSure!
* Hal Duncan's ''Literature/TheBookOfAllHours'' has {{Magitek}} nanites charged with the souls of dead gods. It's an ideal medium for carving new identities on people's minds and souls by tattooing their bodies. A large collection also gets loose at the end of the first book, leading to a Grey Goo scenario that gnaws at the very substance of reality. All that's left are pockets of semi-stable time and [[TheoryOfNarrativeCausality narrative]] as spacetime [[TimeyWimeyBall gets even more fractured than it already was]].
* The title ExtremeOmnivore BlobMonster in the ''Literature/TheClone'' has some shades of this, although it's green and not grey. Nearly everything it touches, organic and ''in''organic, it converts directly into more of its own body mass.
* Discussed derisively in ''Literature/SchildsLadder'', which is set in a post-[[TheSingularity Singularity]] galactic society: an AI character mentions the conspiracy theory that [[TheMetaverse metaverse]]-dwelling minds would assimilate planets for computational resources, calling it as preposterous as accusing organic beings of plotting to turn the world into chocolate for infinite desserts.
* ''Literature/TheFourHorsemenUniverse'': The BountyHunter protagonist of the ShortStory "The Last Guardsman" is mortally wounded when his quarry wings him with a [[AbnormalAmmo grey goo bullet]] that eats him alive from the inside out.
* ''Literature/{{Aeon 14}}'': Nanotechnology is common in the series and nanotech weapons easily combated. However the picotechnology mastered by scientists aboard the colony ship ''Intrepid'' is potentially very dangerous: the Intrepid Space Force under Tanis Richards successfully uses picobombs several times against opposing ships, but there are reports of people trying to replicate the weapons and getting entire planetary civilizations eaten for their troubles (or killed by OrbitalBombardment when the Orion Guard gets wind of the experiments, in the case of the birth family of Tanis's adopted daughter Sanavi).
* In ''[[Literature/TheLongEarth The Long Cosmos]]'', one of the parallel Earths has been entirely devastated by a matter replicator run amok. The matter replicator was originally supposed to absorb enough vegetable matter to produce a book of the complete works of Shakespeare, but once a glitch caused it to produce another replicator just like it... which in turn produced other replicators. It did not help that the replicator owner, who was only concerned with spreading the knowledge of Shakespeare across the parallel Earths, completely failed to anticipate the dangers of a rogue self-replicating machine let loose on a planet.
* In ''Literature/SpyGearAdventures'', this is the focus of the fourth book, ''The Doomsday Dust'', and [[MrExposition Cyril]] explains the trope by name to the others.


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* In the ''TabletopGame/StarWarsRolePlayingGame'' supplement ''The Unknown Regions'', a Grey Goo named Mnggal-Mnggal is mentioned. It is sentient, and able to infect any form of matter, as well as take control of creatures as 'zombies'. Its origins are unknown, and it's likely biological. Note: If there was a trope for biological Grey Goo Mnggal-Mnggal would fit there.


* In the ''Tales of Tomorrow'' episode "Red Dust", space explorers who've just visited a once-populated world overrun by Red Goo discover the pink crystalline "dust" has infested their ship, as well.

to:

* In the ''Tales of Tomorrow'' ''Series/TalesOfTomorrow'' episode "Red Dust", space explorers who've just visited a once-populated world overrun by Red Goo discover the pink crystalline "dust" has infested their ship, as well.

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* In ''Literature/SpyGearAdventures'', this is the focus of the fourth book, ''The Doomsday Dust'', and [[MrExposition Cyril]] explains the trope by name to the others.

Added DiffLines:

* ''VideoGame/{{Brawlhalla}}'' in the backstory of Barraza, it's described how [[MegaCorp Meyer's Baby Food Corporation]] attempted a desperate move on a rogue agent's hideout by deploying a self-replicating nanobot cloud on them. These nanobots bricked anything that relied on computer circuitry... which in 2150 was ''everything''. The nanobots were supposed to go inert after 20 minutes, but for some reason they didn't. The end result was the Mad Max-esque post-apocalypse world that Barraza comes from.


Compare BlobMonster and CloneByConversion. For the RealTimeStrategy game about (and playing as!) the grey goo, see ''VideoGame/GreyGoo2015''.

to:

Compare BlobMonster BlobMonster, PlanetEater, and CloneByConversion. For the RealTimeStrategy game about (and playing as!) the grey goo, see ''VideoGame/GreyGoo2015''.


** [[http://scp-wiki.wikidot.com/scp-009 SCP-009]] is red colored water that freezes when warm and melts when cold and turns normal water into more of itself. The number is likely a reference to ice-nine from ''The Cat's Cradle''.

to:

** [[http://scp-wiki.wikidot.com/scp-009 SCP-009]] is red colored water that freezes when warm and melts when cold and turns normal water into more of itself. The number is likely a reference to ice-nine from ''The Cat's ''Cat's Cradle''.


** [[http://scp-wiki.wikidot.com/scp-009 SCP-009]] is red colored water that freezes when warm and melts when cold and turns normal water into more of itself. The number is likely a reference to ice-9 from ''The Cat's Cradle''.

to:

** [[http://scp-wiki.wikidot.com/scp-009 SCP-009]] is red colored water that freezes when warm and melts when cold and turns normal water into more of itself. The number is likely a reference to ice-9 ice-nine from ''The Cat's Cradle''.

Added DiffLines:

** [[http://scp-wiki.wikidot.com/scp-009 SCP-009]] is red colored water that freezes when warm and melts when cold and turns normal water into more of itself. The number is likely a reference to ice-9 from ''The Cat's Cradle''.


* Hermione Granger ''Fanfic/TheArithmancer'' realises that it's possible for a combination of transfiguration and runic magic to create a self-replicating swarm, and promptly freaks out until she examines the problem more carefully and decides that it would be very hard to ''accidentally'' create a self-sustaining swarm; most configurations would eventually degrade and/or run out of power. [[spoiler: She does create a limited swarm for herself as a last-ditch weapon, and uses it to kill Bellatrix Lestrange.]]

to:

* Hermione Granger ''Fanfic/TheArithmancer'' realises that it's possible for a combination of transfiguration and runic magic to create a self-replicating swarm, and promptly freaks out until she examines the problem more carefully and decides that it would be very hard to ''accidentally'' create a self-sustaining swarm; most configurations would eventually degrade and/or run out of power. [[spoiler: She does create a carefully limited swarm for herself as a last-ditch weapon, and uses it to kill Bellatrix Lestrange.]]]]
* ''Fanfic/TheSecretReturnOfAlexMack'': The Collective loses containment on a self-replicating nanobot swarm in Nevada, prompting [[spoiler: a HeroicSacrifice by Shar]] to wipe it out in spectacular (yet traumatic) fashion.


* ''TabletopGame/DungeonsAndDragons'' has this in the form of green slime, which converts anything it touches into more green slime. (Except stone, which is immune to it, and wood is more resistant than most. It dissolves metal ''very'' fast, however.) Fortunately, it's immobile, so you can avoid it if you just stay away from it.
* ''TabletopGame/{{Pathfinder}}'' has stats for this as a monster, right down to the name. It's considerably dangerous, able to rapidly devour characters (and their gear!) in its space, infest a single target to devour them even faster, and disperse itself to hide from pursuers. And as a swarm, its immune to weapon damage and targetted spells, meaning depending on your party composition you may have a hard time hurting it at all. (Incidentally, this isn't a case of {{A Wizard Did It}}-- ''TabletopGame/{{Pathfinder}}'' Grey Goo is an actual cloud of high-tech nanomachines. It's assumed to come from Numeria, where an ancient crashed spaceship left a bunch of high technology scattered throughout the landscape.)

to:

* ''TabletopGame/DungeonsAndDragons'' has this in the form of ''TabletopGame/DungeonsAndDragons'':
** A
green slime, which slime converts anything it touches into more green slime. (Except stone, which is immune to it, and wood is more resistant than most. It dissolves metal ''very'' fast, however.) Fortunately, it's immobile, so you can avoid it if you just stay away from it.
it.
** Clockwork horrors are tiny mechanical beings that methodically and very efficiently scour areas of metal, which they use to build more clockwork horrors and continue the cycle. They leave stone, soil and organic material alone, but if left unchecked can easily devastate entire countries or ever strip whole worlds of worked and unworked metal.
* ''TabletopGame/{{Pathfinder}}'' ''TabletopGame/{{Pathfinder}}'':
** The main game
has stats for this as a monster, right down to the name. It's considerably dangerous, able to rapidly devour characters (and their gear!) in its space, infest a single target to devour them even faster, and disperse itself to hide from pursuers. And as a swarm, its immune to weapon damage and targetted spells, meaning depending on your party composition you may have a hard time hurting it at all. (Incidentally, this isn't a case of {{A Wizard Did It}}-- ''TabletopGame/{{Pathfinder}}'' AWizardDidIt -- ''Pathfinder'' Grey Goo is an actual cloud of high-tech nanomachines. It's assumed to come from Numeria, where an ancient crashed spaceship left a bunch of high technology scattered throughout the landscape.))
** ''TabletopGame/{{Starfinder}}'' has the Assembly Ooze, runaway nano-fabrication units that thankfully do not grow uncontrollably (and only rarely make more of themselves), but instead turn everything they eat into whatever they were designed to make. They may seem harmless (unless you happen to be an android or other robotic lifeform), or even beneficial, until one gets into your ship and tries to turn the engine into a pile of laser rifles.



* DiscussedTrope in ''TabletopGame/{{Shadowrun}}''; Nanotech became very pervasive in 4th edition, and the Grey Goo concept is brought up, only written off as "unlikely to ever come to pass" and "an urban myth" by some of the (legit) top scientific experts in universe. Ultimately {{Averted}} as even when nanotech starts to fall prey to hostile A.I., it's shown that it isn't capable of destruction on anywhere near this scale, though it still proves to be ''very'' dangerous.
* The technophage in ''Nova Praxis'' is a Grey Goo substance that occasionally builds larger and meaner war robots instead of more goo. It started as a nanotech weapon with an off-switch that didn't work, and went on to [[EarthThatWas render Earth uninhabitable]].

to:

* DiscussedTrope in ''TabletopGame/{{Shadowrun}}''; ''TabletopGame/{{Shadowrun}}'': {{Discussed|Trope}}. Nanotech became very pervasive in 4th edition, and the Grey Goo concept is brought up, only written off as "unlikely to ever come to pass" and "an urban myth" by some of the (legit) top scientific experts in universe. Ultimately {{Averted}} as even when nanotech starts to fall prey to hostile A.I., it's shown that it isn't capable of destruction on anywhere near this scale, though it still proves to be ''very'' dangerous.
* ''TabletopGame/NovaPraxis'': The technophage in ''Nova Praxis'' is a Grey Goo substance that occasionally builds larger and meaner war robots instead of more goo. It started as a nanotech weapon with an off-switch that didn't work, and went on to [[EarthThatWas render Earth uninhabitable]].



* ''TabletopGame/{{Starfinder}}'' has the Assembly Ooze, runaway nano-fabrication units that thankfully do not grow uncontrollably (and only rarely make more of themselves), but instead turn everything they eat into whatever they were designed to make. They may seem harmless(unless you happen to be an Android or other robotic lifeform), or even beneficial, until one gets into your ship and tries to turn the engine into a pile of laser rifles.


* Wiki/eSCPFoundation:

to:

* Wiki/eSCPFoundation:Wiki/SCPFoundation:


** [[http://www.scpwiki.com/scp-3280 SCP-3280]] is a sapient water-like substance that converts any water it touches into more of itself, and which seeks out humans to force itself into, killing the victim from within. [[spoiler:And it managed to take over the Earth's water cycle. The protagonist reading the SCP entry turns out to have an instance of SCP-3280 within itself, and as they fall against a window, they realize that the rain outside isn't just rain, it's falling ''up'' towards them, as the killer water inside of them expels from their throat.]]

to:

** [[http://www.scpwiki.com/scp-3280 SCP-3280]] is a sapient water-like substance that converts any water it touches into more of itself, and which seeks out humans to force itself into, killing the victim from within. [[spoiler:And it managed to take over the Earth's water cycle. The protagonist reading the SCP entry turns out to have an instance of SCP-3280 within itself, and as they fall against a window, they realize that the rain outside isn't just rain, any rain pounding on the window, it's falling ''up'' towards them, as the equally killer water inside of them expels from their throat.]]


* Wiki/SCPFoundation:

to:

* Wiki/SCPFoundation:Wiki/eSCPFoundation:


Added DiffLines:

** [[http://www.scpwiki.com/scp-3280 SCP-3280]] is a sapient water-like substance that converts any water it touches into more of itself, and which seeks out humans to force itself into, killing the victim from within. [[spoiler:And it managed to take over the Earth's water cycle. The protagonist reading the SCP entry turns out to have an instance of SCP-3280 within itself, and as they fall against a window, they realize that the rain outside isn't just rain, it's falling ''up'' towards them, as the killer water inside of them expels from their throat.]]

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