Societal Disruption or Collapse on a Regional scale. If it is a large nation, then world-wide economic damage lasting decades can result.

!! Examples:


[[folder:Multiple Media]]
* Basically every FilmOfTheBook (or radio version) as well as the book of ''Literature/TheWarOfTheWorlds''. The global scale of both the [[Film/TheWarOfTheWorlds1953 1953]] and [[Film/TheWarOfTheWorlds 2005 films]] might raise it to a Class 1.
* ''Series/{{Angel}}'', indicated in the [[spoiler:final episode's last scene]] and mostly shown in the comics. Los Angeles becomes a chaotic demon war zone, although it's undone in the end of "After the Fall".

[[folder:Anime and Manga]]
* The shockwaves created by the [[spoiler:title character]] in ''Manga/{{Akira}}''. One takes out the center of Tokyo. [[spoiler: Then it happens again. In the entire series, it happens 2.5 times.]]
* In the third arc of ''Manga/{{BioMeat|Nectar}}'', 90% of Japan's population has been eaten alive by the eponymous creatures and there are only two populated cities left. [[spoiler: But by the end of the series, the only city left is Osaka.]]
* In ''Anime/EarthMaidenArjuna'', Japan's entire water supply is polluted by chemicals held in plastic containers dissolved by evil bacteria.
* In the manga version of ''Manga/ViolenceJack'', the Kanto area of Japan was destroyed by an earthquake [[spoiler: that was caused by the battle between Satan and Devilman]] and had been separated from the mainland.
* In most arcs of ''VisualNovel/HigurashiWhenTheyCry'', [[spoiler: the Great Hinamizawa Disaster causes the entire village to be wiped off the map, with additional fallout as former residents go crazy across Japan.]]
* Cell in ''Anime/DragonBallZ'' absorbed the life force of entire towns' residents and while searching for Android 18, and blew up dozens of islands. He also wipes out an entire military fleet. Nappa does the same earlier on, and he and Vegeta also blow up part of an Earth city shortly after arriving.
* The Overdrive disaster in ''Manga/RaveMaster'' destroyed what was thought to be one-tenth of the world. They later found out the world was bigger than they thought, but it still wiped a decent sized country off of the map.
* Several characters in LightNovel/{{Slayers}} are capable of Class 0 apocalypses. Lina Inverse routinely uses her Dragon Slave, a spell that is capable of reducing cities to rubble (she also has access to [[ApocalypseHow/ClassX4 more powerful magic]]). Rezo the Red Priest was also able to destroy the Holy City of Sairaag with a Mega Brand spell (the most powerful use of that spell by any character).
* In ''Anime/PuellaMagiMadokaMagica'', this is what happens [[spoiler:in the aftermath of most of Homura's timelines as a result of Walpurgis Night's rampage through Mitakihara Town before being defeated. It's implied that were Walpurgis not stopped, she would eventually score higher on this scale]].
* On the Blue Night in ''Manga/BlueExorcist'', many high-level exorcists suddenly combust into bright blue flames. This changes the exorcist population and hierarchy significantly.
* Z in the 3rd ''Anime/TenchiMuyo!'' [=OVA=] series does this, firing the Chobimaru at Earth with Tenchi failing to stop it. When the timeline's reset and Noike does it again to set things right, a much stronger Tenchi is able to stop it... though he ends up "dying" again, much to his displeasure.
* ''Manga/FullmetalAlchemist:'' the Big Bad [[spoiler:rips out the souls of everyone in Amestris save for a handful of people in his inner sanctum. The souls are returned to the bodies in the next chapter, though.]]
* ''Franchise/{{Gundam}}'' ''loves'' this!
** In ''Anime/MobileSuitGundam'', Zeon's "Operation British" - the ColonyDrop to take out Jaburo - ends up being diverted and half of the colony lands on Sydney, Australia, wiping out 16% of the colony. As well, the narration mentions that the first week of fighting saw both sides losing half their respective population.
** In ''Anime/{{Mobile Suit Gundam 0083|Stardust Memory}}'', the Delaz Fleet performs a ColonyDrop on North America, intending on wiping out its food supply. Didn't really work - they were back on their feet by the time of ''[[Anime/MobileSuitZetaGundam Zeta Gundam]]''.
** In ''Anime/MobileSuitGundamZZ'', Neo Zeon [[OverlyLongGag drops a colony]] on Dublin, Ireland in a show of power!
** In ''Anime/MobileSuitGundamSEEDDestiny'', [=ZAFT=] radicals drop the ravaged remains of Junius Seven on Earth, causing the Break the World incident that ravages the planet.
* In the manga of ''Manga/SandsOfDestruction'', [[PersonOfMassDestruction Kyrie]] accidentally causes a couple of these. He isn't happy about it at all. The [[Anime/SandsOfDestruction anime]] has him keep better control of his powers and averts this trope [[spoiler:until the final episode, when he nearly causes a Class 6 before Morte asks him to stop; it's unclear how much damage he did, whether he just killed Aquilla Rex and a few mooks or if there's a larger area of destruction.]]
* In ''Manga/OnePiece'', the [[OneWorldOrder World Government]] has caused this at least twice:
** The first known instance is their naval forces' Buster Call, an unrelenting barrage of heavy firepower with the goal of killing every last person in the targeted region. This was used to wipe out Ohara, a country renowned for forbidden research.
** Another case is the kingdom of Flevance, which had large deposits of valuable and useful white lead underground. This white lead would prove to be an extremely slow-acting incurable poison through mere exposure when above ground, however. Once the epidemic broke out in Flevance, the World Government quarantined the kingdom, leaving its entire population to die and erasing the country off the map. That being said, had the World Government not hoarded all of the white lead and it was freely distributed around the world as originally intended, white lead disease could've caused a higher apocalypse, up to a Class 3b.

[[folder:Comic Books]]
* An issue of ''ComicBook/TheAuthority'' features a swarm of alien creatures that are launched at Earth. They can't fly, though, so their landing in Japan is "just blind luck".
* In ''ComicBook/TheNewUniverse'', Ken Connell accidentally obliterates UsefulNotes/{{Pittsburgh}} and everything 50 miles across trying to get rid of the Star Brand.
* During ''ComicBook/InfiniteCrisis'', the city of [[WretchedHive Bludhaven]] is completely destroyed when the Secret Society of Super Villains drops Chemo on it. In a later story, the place is so toxic that both Batman and Robin need Hazmat suits to enter; it is likely beyond saving.
* The small island nation of Genosia was destroyed completely during ''ComicBook/HouseOfM'', and as of now, is unpopulated and in ruins.
* In Peter Bagge's ''ComicBook/ApocalypseNerd'', Seattle is nuked by North Korea, and centers around two friends as [[ApocalypseAnarchy they try to survive in the wilds of the Cascade Mountains.]] Background information provided by other characters states that the government has quarantined the area, and the rest of the country has gone unaffected.

[[folder:Fan Works]]
* In the MagicalGirl CrossOver ''Fanfic/ShatteredSkies'', both [[Manga/CardcaptorSakura Tomoeda]] and [[Anime/YesPrettyCure5 Cinq Lumieres]] undergo complete destruction, with the titular phenomenon as a sign of just how bad things have gotten.
* In ''Fanfic/TheConversionBureauNotAlone'', large parts of South Africa in and outside of Johannesburg have been swept clean of human civilization, the rest of the country is plummetting into [[DayOfTheJackboot fascism]], and the rest of the world ends up deeply scarred by the possibility of inter-dimensional pony conquest, making it a borderline Class 1 example.
* In ''Fanfic/EverythingIntoDarkness'', the plot is kicked off by a Class 0 being unleashed upon Iwatodai via [[spoiler:Ikutsuki]] setting loose dragons on the city from a gate beneath Tartarus, and inadvertently sending most of SEES to [[VideoGame/FireEmblemElibe Elibe]] as a side effect.

* ''Film/TwentyEightDaysLater'', which sees the complete destruction of Great Britain by a mutant virus -- in fact, it's implied that Britain was deliberately quarantined (and lied to about the extent of the disaster) because it's an island and at least TheVirus could be contained there.
** The sequel, ''Film/TwentyEightWeeksLater'', shows the reestablishment of a small community of merely 15,000 people in London and its destruction. [[spoiler:During the credits, the infected are shown escaping into Paris, suggesting that we may have moved into a Class 1. Or at least a much larger scale Class 0 (The whole of Europe).]]
* ''Film/{{Armageddon}}''. While a direct hit of the asteroid would be Class 6 or X, the smaller chunks that reached Earth beforehand wiped out a couple of cities.
* At the end of ''Film/CabinFever'', a Class 0 appears to have been narrowly averted, as the posse shows up to clean up after our intrepid heroes succumb to a flesh-eating virus. This lasts until we see the body of the first guy seen with the virus lying bleeding in a river, which is harvested for bottled water, implying a true Class 0 or 1 somewhere down the line.
* ''Film/{{Cloverfield}}''. May range up close to a Class 1, seeing as how [[spoiler: the monster is still alive at the end, and while it might not keep rampaging, it sure as heck doesn't seem like anyone can stop it]]. WordOfGod, however, has stated that [[spoiler: the big nasty bit it]].
* ''Film/TheDayAfterTomorrow'' sends America and Europe into a deep freeze including mile-high glaciers. By the time they understand the gravity of the situation, Canada and Alaska are already essentially doomed. Fortunately, everyone else in the US is able to move to Mexico. The British, on the other hand, are left to perish with dignity, while Australia suffers largest typhoons ever recorded.
* ''Film/DeepImpact'', which only saw the East Coast destroyed by a massive tidal wave; it also mentions Europe and Western Africa being destroyed, and a view from space shows the Caribbean islands having more than a little problem on their hands.
* Many of the ''Franchise/{{Godzilla}}'' films.
* In ''{{Film/Doomsday}}'' a deadly plague, known as the "Reaper Virus," has broken out in Great Britain, killing hundreds of thousands in its wake.
* In ''Disney/{{Frozen}}'', as a result of Elsa's PowerIncontinence, the entire kingdom of Arendelle ended up being strucked under an EndlessWinter in the middle of summer. The winter is played up even more when Elsa gets informed that she accidentally froze her kingdom where in a moment of panic, she ended up setting the kingdom to a giant snowstorm, causing multiple casualties and famines to the point that they decided that the only way to put a stop to the whole winter is to sentence their former queen to death.
* In the early-1970's Japanese movie ''Nippon Chimbotsu'' (''Japan Sinks''), which was remade in 2006, the entire Japanese archipelago is destroyed, Atlantis-style, by a series of massive earthquakes, tidal waves and volcanic eruptions triggered by shifts in the tectonic plates on which the islands rest. The survivors are evacuated literally worldwide.
* ''Film/ShaunOfTheDead'' has an unknown number of people zombified, but few enough the UK manages to get back up on its feet and uses the zombies as cheap labor in retail chains as well as unwitting participants in game and talk shows. Think zombies in '[[Series/{{Wipeout1988}} Wipe Out]]'.
* The 1973 adventure film ''Film/SannikovLand'' is set on an island warmed by a volcano. When the volcano goes to sleep, the island becomes as frozen as the rest of the Arctic, and everyone on it will die.
* Lex Luthor's ultimate plan in the ''Film/{{Superman}}'' movie is to trigger a Class 0 by [[spoiler:sinking California and driving up real estate prices.]]
* The 2008 remake of ''Film/TheDayTheEarthStoodStill2008'' has Gort in the form of a grey goo take out roughly a third of the US. Klaatu stops it with a pulse, [[InferredHolocaust presumably wiping out at least tens of thousands more relying on electricity]]. If the pulse is permanent, then it may be a Class 2.
* ''Film/TransformersAgeOfExtinction'' involves Galvatron's plan to blow up The Seed in the densely populated city of Hong Kong, which is said to have the range of a tactical nuke. And if that isn't bad enough, when he's done he's probably going to turn this Class 0 into a Class 1 or even Class 2 by extending the new problems to the rest of the planet with his shiny new robot army.

* ''Literature/TheThirdWorldWar'' might be a Class 0, as Birmingham and Minsk are destroyed by nuclear weapons.
* The cometary impact at the end of ''Newton's Cannon'' did this to a major chunk of Europe.
* From ''Literature/MotelOfTheMysteries'', the complete burial of North America in accumulated junk mail would rank near the top of the Class 0 category. Technically it ''ought'' to be a Class 1, if the rest of the planet was set back so far that they forgot what a "motel" (or, worse, a toilet!) is; because the whole book's just one long RunningGag, however, let's avoid living out ContrivedStupidityTropes, and evaluate it by the direct physical effects of this lame-o disaster.
* ''Literature/TheSilmarillion'' has the destruction of Númenor by [[{{God}} Eru]]. Morgoth's triumph just before the end of the First Age may also count, and the destruction of Beleriand in the War of Wrath definitely does.
* ''Literature/AlasBabylon'' is somewhere between Class 0 and Class 1, in that the US and USSR engaged in large scale nuclear war that decimated their respective populations, but left the third world more or less intact. The majority of the US is knocked back to 19th century technology, and using wheat for something as trivial as making alcohol would get you lynched.
* The disaster preceding the events in Margaret Atwood's ''Literature/TheHandmaidsTale'' is a Class 0 or a Class 1, leading to a dystopia in the United States, but there are hints the rest of the world isn't as dramatically affected.
* Creator/SergeyLukyanenko's ''Линия Грёз'', as set in the VideoGame/MasterOfOrion universe, features several varieties of planet-scale destruction. As most races in the conflict span over multiple systems, those attacks are Class 0. This might of course instantly move up to class 5 or 6 if the species in question has been reduced to inhabiting only one planet (usually their native one) or the attacks are directed against all planets inhabited by the fraction simultaneously. Luk'yanenko avoids the topic of pre-space age species; in the games it's possible to find native sentient life on generally life-friendly planets. Wiping those aborigines out is discouraged, though, as they turn into an agricultural boon for the race to settle on the planet. Examples of destruction:
** Massive biological weapon bombardments employed by the human Empire during the last great interspecies war on Bul-Rathi planets.
** Human ''free hunters'' carry a small antimatter payload, which they are supposed to drop if they happen to get close enough to any hostile inhabited planet.
** The human Empire goes for planet-wide meson bombardment on planets that are about to be conquered by an alien race and indefensible at the current tactical situation. Several decades later a refugee remarks that there is hope for her homeworld - the oceans are about to stop boiling.
** A large bomber spaceship is sacrificed during an orbital battle above a planet for tactical reasons. As the battle itself ends, the ship is damaged beyond salvaging and is left to drop to the surface without disarming the payload. This results in boiling the oceans, melting the crust to glass-like results and irradiating the entire planet. The scattered and partly exploded bombs embedded in the glassed crust make the planet completely uninhabitable.
* Creator/SergeyLukyanenko's ''Веллесберг / Лорд с планеты Земля'' shared universe features a quark fission bomb which slowly turns a planet into fine dust. While the planet in question is Earth, [[spoiler: humanity has already settled all over the galaxy, using time travel to found colonies in the past]], placing this example here in Class 0.
* In John Birmingham's ''Without Warning'', a strange energy bubble spreads over North America, annihilating all primates and a seemingly random selection of other chordate species (for instance pigs get wiped out, deer do fine) on the continent save for Alaska a small portion of the Pacific Northwest and about the southern third of Mexico. Another Class 0 happens later when Israel is forced to [[spoiler: use its nuclear arsenal to fend off an Arab invasion]].
** In the sequel ''After America'' the ripple effect has brought this to the verge of a Class 1 four years later. Mexico is a failed state, the after effects of [[spoiler: the Second Holocaust, Israel's nuking of it's neighbors]] has resulted in the [[BalkanizeMe balkanization of France and Germany]], pirates roam both the Pacific and Atlantic at will as well as [[spoiler: serving as foot soldiers for an Islamic invasion of Manhattan]], While no one is starving in Britain, [[UnfortunateImplications which has avoided it's own Islamic problems by deporting most Muslims and interning the rest]] food and fuel are both rationed and bicycles and horsedrawn carts are more common on the road than cars.
* Literature/TimeScout's backstory includes a mysterious The Accident, somehow involving a space station, that devastated the globe's coastal communities and caused random {{Time Portal}}s to open up.
* In ''Literature/{{Carrie}}'', a prom night prank causes Carrie to unleash the psychic powers she had been developing upon the town of Chamberlain. By the time all is said and done, the high school where the prom was held is blown to kingdom come, and much of the town is razed to the ground.
* Creator/WilliamRForstchen's ''One Second After'' has the US hit by a massive EMP resulting in a collapse of society and, in the end a DividedStatesOfAmerica. Iran and North Korea are nuked in retaliation although it's implied that they may not have done it.
* Subverted in ''Literature/SeptimusHeap'', as the [[spoiler:Darke Domaine that overruns the Castle in ''Darke'' eventually is contained with few victims.]]
* In John Barnes ''Mother of Storms'' there is a background incident caled "The Flash" that happened ten years previous to the beginning of the book that refers to a terrorist nuking of Washington DC.
* The eponymous disaster in Creator/HarryTurtledove's ''Literature/SupervolcanoEruption'' which wipes out large chunks of Wyoming, Idaho and Montana as well as smaller pieces of Utah and Colorado. However it's stated that the aftereffects have the potential to become at least a Class 1. There is also a nuclear exchange between Israel and Iran that further complicates matters.
* Adron's Disaster, from the Literature/{{Dragaera}} series, reduced the Empire's capital city to a miles-wide sea of raw chaos, and kicked off a continent-disrupting Interregnum whose impact on society is still being felt.
* A background event of Creator/DavidBrin's ''Literature/{{Existence}}'' is Awfulday which was the setting off of a couple of "dirty bombs" in Washington DC.
* ''Literature/UnderTheDome'' by Creator/StephenKing is a very small example of this as only one small town in Maine is affected.
* In ''Literature/ThePassage'' and it's sequels the vampire plague only affected North America. A quarantine kept it from spreading further.
* At the end of ''Literature/CiaphasCain: Caves of Ice'', the Valhallans detonate an impromptu fuel-air bomb composed of several million liters of refined promethium poured into mine shafts, with the intent of destroying a Necron tomb. This results in a gigaton-range blast that buffets their orbiting troopship. Meets the minimum requirements by dint of obliterating the only civilization on the planet (the refinery).
* ''Literature/TheYearsOfRiceAndSalt''. The Black Death was 90+ % fatal between the Volga and the Atlantic, depopulating Europe in the 1300s. The book covers the next 6 centuries of how the other civilizations go on without Western civilization's interventions and contributions.
* In [[Creator/BenCroshaw Ben "Yahtzee" Croshaw]]'s ''Literature/{{Jam}}'', a regional Class 5 happens to Australia as the eponymous substance is accidentally unleashed upon the continent, and swallows every organic being that isn't above ground level.
* In Robert Ferrigno's ''Assassin Trilogy'' New York and Washington DC have been nuked by terrorists fifteen years before the first book as well as Mecca being radiated by a dirty bomb. When it's revealed that elements of Israel's government were behind this Israel is destroyed in the backlash and a civil war results in a DisunitedStatesOfAmerica.
* In Adam Sternbergh's ''Shovel Ready'' a dirty nuke was set off in Times Square ten years previous to the books beginning rendering about half the city uninhabitable.
* At one point in ''Discworld/ThiefOfTime'', ThePeteBest of the HorsemenOfTheApocalypse reminisces on how most of the "gigs" they did at the dawn of civilization were of this type, with small villages or tribes being wiped out or forced to relocate.
* Allan Steele's ''Jericho Iteration'' takes place about six moths after a massive earthquake leveled much of St. Louis.
* The plot of Will [=McIntosh=]'s ''Hitchers'' is kicked off by a terrorist attack on Atlanta involving anthrax that winds up killing 600,000 people.
* ''Literature/GreenAngel'' is a post-apocalyptic tale that begins when an extremist group called the Horde blows up a city. As the fallout settles, the Horde works outward to spread its Luddite-esque beliefs throughout an undetermined but considerable region.
* Happens in both timelines in Wolfgang Jeshke's ''The Cusanus Game''. In the main timeline a nuclear disaster in France's Cattenom reactor renders much of Germany uninhabitable. In the offshoot the same thing happens in California due to the 1906 California earthquake.
* In "Literature/TheStonesAreHatching", British civilisation is shown to have mostly collapsed, with people reverting to Pagan practices out of fear, due to being attacked by hundreds, perhaps thousands of supernatural monsters. Because of the size of the Stoor Worm, it can be reasonably assumed that the same is occurring in mainland Europe.
* ''Literature/SecondApocalypse'': The first apocalypse happened long ago, when the Inchoroi created the No-God in an attempt to kill all but 144,000 souls in Earwa and thereby sever its connection to the afterlife. Although the No-God was destroyed, the resulting catastrophe obliterated the Great North and caused all births to be stillborn for 13 years afterward. Since then, the backwater Three Seas region has risen to become the center of human civilization, while the North is a wasteland still swarming with the Inchoroi's Sranc.
* This is the subject of many of the "eco-horror" novels of the '70s and '80s, which dealt with swarms of poisonous insects and arachnids, rats, amphibians, reptiles and just about every creepy creature that exists. A good example of one of these novels is ''The Spiders'' by Richard Lewis (a pseudonym for novelist Alan Radnor). Briefly: a new, highly destructive species of spider emerges in the English countryside; larger than any kind of spider ever seen, it has macerating jaws designed for eating flesh, is deadly poisonous and a pack hunter. The horde of arachnids begins to spread out and eventually takes over London, causing unprecedented loss of life, chaos, riots and, ultimately, abandonment of the city and most of the southern part of the English isle (including Wales). By the time researchers figure out a way to destroy the species, the damage is done and it will presumably take the region decades to recover. Most eco-horror novels had a similar plot to ''The Spiders.''
* In a unique case of ''literal'' Societal Collapse, virtually the entire population of the Yugoslavian city of Podujevo dies when the giant humanoid figure they've [[TheWormThatWalks assembled themselves into]] topples over in Creator/CliveBarker's "In The Hills, The Cities". The fate of their one-time rivals in the city of Popolac is not stated, but given that they too are amassed into a giant humanoid figure that has ''gone insane'' from the horror of Podujevo's fate, it's unlikely that city fared any better.
* "Literature/TheTamariskHunter": The unending drought "Big Daddy Drought" along with the loss of water rights have destroyed much of the Southwestern US.

[[folder:Live-Action TV]]
* In an alternate timeline in ''Series/DoctorWho'''s "Turn Left" where the Doctor dies in the early 21st century, a nuclear storm drive ship called ''Titanic'' hits London, wiping out the entire city and locking out any immigration to and from the UK. The ship itself easily had the potential to be on the scale of Class 5 or 6, so it's assumed that the disaster was actually mostly averted. Later, over 50 million Americans are forcibly turned into creatures made of fat called Adipose, killing the humans they were made from.
* In two unrelated {{bad future}}s of ''Series/{{Heroes}}'', a man with nuclear-based superpowers destroys an entire city (New York City and Costa Verde, California, respectively). Another future shows Tokyo being destroyed in a flash of light.
* In ''Series/{{Torchwood}}'', the opening of the rift summoned a massive beast named Abaddon whose shadow killed off hundreds, if not thousands of people before Jack stopped it.
* In ''Series/RedDwarf'', due to a volcanic eruption, most of Fiji is now several feet underwater.
* Series/BuffyTheVampireSlayer's destruction of Sunnydale when it's sucked into a crater.
* While the world of ''Series/{{Revolution}}'' is Class 1 verging on Class 2 at the end of the first season there is a Class 0 when [[spoiler: Philadelphia and Atlanta are nuked by the Patriots]].
* In ''Series/DeepSpaceNine'' the entire social and economic structure of Ferenganar is thrown into chaos when Grand Nagus Zek grants women equal rights. Before then they had never been able to speak(unless spoken too), earn profits, leave the house, or even ''wear clothes''. The sight of them doing all four causes enough chaos to disrupt planetary communication and oust Zek as Nagus.

* The song Aenima by Music/{{Tool}} (as well as the Bill Hicks routine the song is based on) describes the entirety of California sinking into the Pacific Ocean, creating the Arizona Bay.
* The Music/BillyJoel song "Miami 2017 (Seen The Lights Go Out On Broadway)" is about [[NoodleIncident an unspecified disaster]] that wipes out New York City and the surrounding areas, but "life went on beyond the Palisades" and most people have moved to Florida, and TheMafia is thriving in Mexico.
* The Music/{{Genesis}} song "The Last Domino".
* The Chris De Burgh song "Transmission Ends".
-->''This is station Planet Earth, we're closing down,''
-->''Transmission ends.''

[[folder:Tabletop Games]]
* Damien Richter's activities and a brief orbital bombardment with hypervelocity mass drivers destroyed much of the capital planet of Avalon in ''TabletopGame/TechInfantry''. And the first [[BugWar Bug Invasion]] wipes out Rio de Janeiro and the surrounding area of Brazil two centuries before that.
* The main weapon batteries of any ''TabletopGame/{{Warhammer 40000}}'' cruiser can, in the words of Literature/CiaphasCain, [[note]]'''[[FakeUltimateHero HERO OF THE IMPERIUM!]]'''[[/note]], "level continents." ''40K'' doesn't even need weapons to accomplish this - the debris from a naval engagement can cause catastrophic damage all on its own. Think about it, the average cruiser in that setting is several kilometers long, several hundred meters wide and tall, and weighs in at millions upon millions of tons of armoured hull. If one of these ships breaks up in orbit, even the fragments will be million-ton steel meteors, and if it goes down in one piece, the planet below gets nailed by a meteorite like a large mountain! And that's not even mentioning the even larger heavy cruisers, battlecruisers, grand cruisers and vastly larger battleships.
* The city of TabletopGame/{{Mordheim}} was struck by a comet made of [[GreenRocks Wyrdstone]]. Most of those who weren't killed were driven mad or mutated. What was left of the city [[DisasterScavengers was looted]] by human and non-humans who warred amongst each other in the lawless streets for the best spoils.
* In TabletopGame/{{Greyhawk}}, this probably describes the Rain of Colorless Fire, a disaster that destroyed [[TheEmpire the Suel Empire]] millennia ago. Not many Oeridians currently alive know what happened, but most assume the Suel did it to themselves when attempting to do something ''very'' evil.
* Killing off darklords in the ''TabletopGame/{{Ravenloft}}'' setting has been known to cause entire domains to disappear, their native populations included.

* ''VideoGame/FinalFantasyVII'', with the [[spoiler: destruction of Midgar at the end of the game]]. The [[GainaxEnding ambiguous ending]] left some gamers thinking that a Class 3 scenario occurred, but ''Final Fantasy VII: Advent Children'' [[{{Jossed}} corrected this]].
** However, what Sephiroth planned was of Class 5.
** Jenova's landing 2000 years ago was a Class2 to the Ancients/Cetra.
* The original version of ''VideoGame/FinalFantasyXIV'' ended with the fall of the moon of Dalamud and the awakening of Bahamut, resulting in the ruination of the continent of Eorzea. By the time ''A Realm Reborn'' takes place, it's been five years since, and civilization has more or less gotten back on its feet.
* The backstory of ''VideoGame/FinalFantasyTactics'' indicates that at some point after ''VideoGame/FinalFantasyXII'', a huge catastrophe hit Ivalice and destroyed the entire political structure, several races (like Moogles), and most of the advanced technology, like Airships. Its never said if it also hit the rest of the unnamed world where Ivalice is located, so this may actually be a Class 2.
* Thanks to constant war, Societal Collapse and Disruption are so common in ''Videogame/LostTechnology'' that no society has persisted for more than fifty years.
* The Catastrophe in ''VisualNovel/{{Snatcher}}'' rendered most of Eurasia uninhabitable, prompting mass immigration to new islands built in Japan.
* The Zone in ''[[VideoGame/{{STALKER}} S.T.A.L.K.E.R.: Shadow of Chernobyl]]''
** Interestingly, while civilization inside the Zone is pretty much gone, the rest of the world is actually ''better off''. The chance to observe the laws of physics and biology change first-hand has resulted in the creation of several advances in metallurgy and antibiotics, and nobody lived in the Zone beforehand who wasn't trying to perfect {{mind control}} anyway.
** Though this may become a higher class, as it is suggested the Zone is expanding, and it has been established that the Zone is independent, and if the Zone expands...well, a world full of Bloodsuckers won't be so much fun.
* ''VideoGame/KillingFloor'''s mutant outbreak is effectively limited to Great Britain, which seems lucky as the only survivors are either former military or CrazyPrepared.
* ''VideoGame/SpecOpsTheLine'' has a post-apocalyptic Dubai thanks to the sandstorm, [[spoiler: [[BloodKnight Walker's]] [[ThroughTheEyesOfMadness madness]] strucks the finishing blow by killing every remaining survivors]].
* In ''VideoGame/GuildWars'', this has happened on several occasions.
** The earliest known event was the Scarab Plague which struck the isle of Istan. It was centuries before the isle was fully repopulated.
** Perhaps the most devastating followed some time after when the god Abaddon was banished into the Realm of Torment. As a result of that, the Crystal Sea was devastated, half becoming a vast desert and the other turning into a hostile wastes of sulfurous sands.
** The Jade Wind in Cantha, caused by the traitor Shiro, devastated the continent turning a sea to jade and forest to stone.
** While the previous events were backstory, the first game, ''Prophecies'', starts with the Searing. Summoned by the Charr, burning crystals rained down on the human kingdom of Ascalon, killing much of the population and leaving the survivors locked in a struggle for survival in a barren wasteland.
*** Humanity eventually lost Ascalon as a result of the Searing; it was claimed by the Charr. More than two centuries later the land is still recovering.
** Shortly after the Searing, Charr forces marched into the nearby human kingdom of Orr. A desperate attempt to drive them back caused the Cataclysm, a magical catastrophe that killed everything within the kingdom and sank the island beneath the sea. Many of the slain arose afterward as undead.
** In the backstory of the sequel, the Cataclysm will be reversed, causing another Class 0 event. The return of Orr to the surface will cause massive tidal waves, destroying the coastal cities of Kryta and drowning the Battle Isles.
* In ''VideoGame/Left4Dead'' and ''VideoGame/Left4Dead2'', the entire East Coast United States, from New York to Louisiana, has been lost to the rapidly spreading [[TheVirus mutated rabies virus]], turning people into bloodthirsty animals who's [[UnstoppableRage extreme pent up rage]] and [[TooDumbToLive severe loss of mental functions]] leave them in a zombie like state. So far, the [[GovernmentAgencyOfFiction Civil Emergency Defense Agency]] has been useless to stop the spread, leaving the [[UsefulNotes/YanksWithTanks US Military]] to [[TimeForPlanB take over]] with a more {{violen|ceIsTheOnlyOption}}t and [[ArmiesAreEvil potentially genocidal]] approach (includes [[KillEmAll slaughtering entire groups of citizens]] because one or two ''might'' be infected).
* In the ''Franchise/ResidentEvil'' series, almost all of Raccoon City had become zombified, so the US government sent a nuclear bomb to contain the outbreak.
* ''VideoGame/TalesOfMonkeyIsland'': [[spoiler:The entire Gulf of Melange in Chapter 5, right between this class and Class 1, and bordering on Class 3A. And it seems that the Caribbean just isn't pretty much the same since [[BigBad LeChuck]] regained his voodoo powers and [[HeroKiller killed Guybrush]].]]
* In ''VisualNovel/DanganRonpa'', [[spoiler:the outside world (according to the BigBad, who [[UnreliableNarrator isn't the most truthful person]]) is shown to be in ruins, with giant Monokumas destroying buildings and the citizens wearing Monokuma masks and smashing cars and shops like skinheads -- all thanks to the Worst, Most Despair-Inducing Moment in the History of Mankind.]]
** It's shown in ''VideoGame/AbsoluteDespairGirls'' that [[spoiler: she was telling the truth]].
* The BigBad of ''VideoGame/{{MOTHER 3}}'' aims to cause this to the Nowhere Islands [[spoiler: by awakening the massive dragon sleeping beneath them. Though he's stopped, the destruction ends up happening anyways, because the dragon's help was needed by the heroes. [[GainaxEnding Whether or not anyone actually survived is left up to the player.]] Also technically counts as global destruction, as said islands are the only part of the world that's habitable anymore.]]
* ''VideoGame/YakuzaDeadSouls'' takes place in the midst of a ZombieApocalypse. Said apocalypse, however, never spreads beyond the Tokyo district of Kamurocho.
* ''VideoGame/DyingLight'' has a mutated strain of rabies break out in the fictional city of Harran, resulting in two of the city's districts being quarantined off. Humanitarian aid (including a drug that suppresses the symptoms of the infection) is dropped in [[spoiler: until the GRE and the Ministry decide to pretend that there are no survivors left]].
* In ''VideoGame/SandsOfDestruction'', [[PersonOfMassDestruction Kyrie]] accidentally causes two Class 0s: once at the start of the game when he [[DoomedHometown destroys Barni]], and again at [[spoiler:the Sky Gaol during the peace talks]] thanks to some serious PowerIncontinence. If his powers ever fully activate (which [[OmnicidalManiac Morte]] and [[TheExtremistWasRight the world itself]] actually want to happen), he's capable of causing a Class 6, turning the entire world and everything on it to sand.
* ''VideoGame/DevilSurvivor'' opens up with this being inflicted on Tokyo due to a combination of a demon invasion and a JSDF lockdown. Its sequel ''VideoGame/DevilSurvivor2'' also starts like this, but on a worldwide scale.
* ''VideoGame/{{Undertale}}'''s bad ending ''starts'' with you [[spoiler:exterminating the entire monster population of the underground, ''by hand''.]] If you actually go all the way with it, it gets much, much worse.
* ''VideoGame/PokemonXAndY'': The Ultimate Weapon ended the ancient war in Kalos by virtue of sapping the life of everyone and everything in the country, save the guy who activated it (it made him immortal). [[spoiler:Team Flare wishes to fire the thing up again, but this time aiming for a global holocaust that would leave only themselves alive.]]
* ''VideoGame/DragonBallXenoverse2'' reveals through NPC encounters what happened to the HubWorld of ''VideoGame/DragonBallXenoverse'', Toki-Toki City: [[spoiler:A rumor flew around that the Kais were weaker than gods like Beerus and Whis and even mortals like Goku and the hero of the first game. The Supreme Kai of Time was so incensed over this that she made the large dragon statue come to life as a show of power... and the stupid thing went berserk. By the time the statue was contained, the city was ravaged and was later rebuilt as Conton City.]]
* The year 2031 starts off as this in ''VideoGame/AMindForeverVoyaging'': The economy of the United States of North America (USNA) is failing. Great numbers of youths are turning to "Joybooths" (a device which directly stimulates the sensory input of the brain) and committing suicide by over-stimulation. A new arms race involving nuclear weapons no larger than the size of a common pack of cigarettes threatens to turn the USNA into a police state. Senator Richard Ryder has imposed the Plan for Renewed National Purpose to set the society back on its feet again. As the world's first sentient computer called PRISM, you are to go into future simulations in decades to see how the Plan fares. In the 2041 simulation that you investigate, this class is averted, as society is becoming normal... at first. But in the 2051 sim afterwards, your town of Rockvil is getting some societal disruption. By 2061, this is becoming Regional Societal Collapse, as the USNA is slowly turning into a polluted, religious police state and becoming the OppressiveStatesOfAmerica. [[FromBadToWorse It goes even further than that in the 2071 and 2081 sims, as the USNA will eventually turn into the]] FallenStatesOfAmerica.

[[folder:Web Comics]]
* In ''Webcomic/{{Chirault}}'' the mages level a city by [[FinaglesLaw accidentally]] touching their RealityChangingMiniature. [[GoneHorriblyRight Oops.]]
* In ''Webcomic/FreakAngels'' at first it's assumed that the flooding was global but is later revealed that [[spoiler: only Britain was affected]]
* In ''Webcomic/TheOrderOfTheStick'', [[spoiler:Azure City]] gets assaulted, partly destroyed and ultimately dominated by [[spoiler:mainly Redcloack and]] Xykon. Whether the place will ever be returned to its original state is yet to be seen. However, most probably not, since there is a new nation there now and destroying it to bring back the old inhabitants would be this trope too, and the refugees have found a new place to live.

[[folder: Web Original]]
* ''Literature/ForAllTime'' has quite a few examples, given the flagrant disregard of the NuclearWeaponsTaboo. However, the crowning examples have to go to the Soviet Union's final wars. What else could you expect with ''Andrei Chikatilo'' as premier?
** The Sino-Soviet War, which begins on February 19, 1973. China launches a series of bombings on every major siberian urban center south of the 60th parallel and manages to drop a 3-megaton device onto Moscow. These attacks kill roughly 100 million in total. In response, the Soviets utterly decimate China, wiping out every city east of the 100th meridian with a population of 1 million or more, along with the destruction of all major agricultural, industrial, and military complexes. This, coupled with an invasion through the spring and summer that sees the use of chemical and biological weapons, wipes out roughly 80% of China's population.
** In October 1975, they launch an unproved bombing campaign on the Middle East [[DisproportionateRetribution to gain a monopoly on the world's oil supply.]] This includes nuking Baghdad, Damascus, Tehran, Baku, Ankara, Jerusalem, Mecca, Medina, and the High Nasser Dam in Egypt. The final attack results in a GiantWallOfWateryDoom that kills 98% of Egypt's population.
** Finally, the USSR ''itself'' undergoes a nuclear civil war in the 1980's. The event results in it [[BalkanizeMe collapsing into dozens of smaller states.]]

[[folder:Western Animation]]
* In the series ''WesternAnimation/GeneratorRex'', millions die worldwide after The Nanite Event. And thanks to the nature of the nanites, it could escalate all the way up to a Class 4 - maybe even Class 6 - at any moment.
* One happened offscreen and in the past in the original ''MyLittlePony''. The kingdom of Grundleland was wiped out the last time the Smooze was unleashed, leaving only a tiny handful of survivors.
* PlayedForLaughs in the ''WesternAnimation/EdEddnEddy'' episode "Run For Your Ed". Ed, once again, has been sleepwalking... right into the Kanker's house and wound up stealing their prized ship-in-a-bottle. The three half-sisters proceed to find it "Kanker style". Their rampage and subsequent "Kanker Hissy Fit" turns ''all'' of Peach Creek (the cul-de-sac, the construction zone, the river, etc) in a ruin. Cars smashed, streets cracked, cement walkways peeled up, and homes demolished made it look like it was the End of Days for Rethink Avenue.

[[folder:Real Life]]
* At least 3 are known to have happened in antiquity: 2250 BC saw the fall of the Sumerians and the [[AncientEgypt Egyptian Old Kingdom]]. Another around 1200 BC saw the Hittites, Babylonians, Assyrians, Cretans, the Myceneans and the Indus Valley all collapse, and Egypt just barely hang on. A third was the slow-motion collapse of the [[UsefulNotes/TheRomanEmpire Western Roman Empire]] from AD 300-600.
* The decline of [[UsefulNotes/PreColumbianCivilizations Mayan civilization]] during the 8th and 9th centuries probably count as this - not enough to wipe out the Mayan population entirely (indeed, Mayan city-states still existed when the Spanish arrived and there are still Mayans living there to this day) but it's not near what it once was based on archeological evidence. Some archeologists believe that the decline of the Maya happened quietly over several generations being compelled to move away from the cities, or to never marry and have children, for economic reasons, rather than a single dramatic event.
* The Mongol invasions. In Russia for example, half the population was killed, while estimates range up to 90% of Iran's population being destroyed by the Mongols and subsequent famines.
* Between the Great Famine and the Black Death, the [[TheLateMiddleAges 14th century]] was this to Europe.
* The population of Easter Island was nearly wiped after they [[NiceJobBreakingItHero destroyed the local flora to build]] [[EenieMeenieMinyMoai those statues]].
* During UsefulNotes/WorldWarI, pretty much an entire generation of men across Europe died or were badly injured. The 'deficit' in young men was thought to be about 9 million.
* Iceland suffered one of these in the [[ 1780s]] when an eruption killed 50% of the animal population on the island and up to 25% of the human population.
** At the same time, the consequences of the eruption spread to Egypt (roughly one sixth of its population died in the ensuing famine), caused a heat wave to spread across Europe while North America froze over.
* The UsefulNotes/RussianCivilWar furthered the pain on the populace in Russia after World War I ended.
* The Spanish Flu epidemic of 1918 - 50-100 million dead (about 3-5% of the world's population).
* The Warlord Era and the UsefulNotes/ChineseCivilWar ensure political power struggles pre-empted the peace needed to rebuild in China before an increasingly militant and expansionist Japan muscled its way in.
* UsefulNotes/WorldWarII
** The WorldWarII/WarInAsiaAndThePacific was this for China, Korea, and many other Asian/Pacific nations. Because of UsefulNotes/ImperialJapan. For starters, look up The Rape of Nanking on Wikipedia ([[FromBadToWorse and it gets worse from there]]).
** The [[UsefulNotes/AtomicBombingsOfHiroshimaAndNagasaki two atomic bombs]] that were dropped in UsefulNotes/WorldWarII, though this actually comes in second to the other bombing campaigns over Japan during WWII; the firebombing of Tokyo alone killed about as many as the atomic bombing of Hiroshima did. Firebombing operations happened far, far more often than atomic bombings, obviously. Then add in mass occasions of conventional bombing operations, and US aircraft shooting down poorly trained Japanese pilots in droves by that time period, and...well, Japan lost a massive amount of people.
** Eastern Europe suffered a fate between this and a Class 1 in the two world wars, caught between Imperial Germany/Nazi Germany on one side and Imperial Russia/the Soviet Union on the other. Rebuilding ''still'' hasn't finished in parts of Warsaw, and the 400,000 manuscripts and three million other books and maps burnt by the Nazis can never be recovered.
** The level of destruction in Europe (especially Germany) and Japan even without the atomic bombs was probably a Class 0 in and of itself.
* This occurred in the (formerly Belgian) [[UsefulNotes/DemocraticRepublicOfTheCongo Congo]] during the [[TheSixties 1960s]]. The country's infrastructure was destroyed in a series of wars and its mineral wealth was stripped by a succession of dictators. There are still manned railway stations in one town that have not seen a train in decades. Land travel is virtually impossible along the Congo river due to fact that parts of the route are either inhabited by AxCrazy marauders or completely overgrown.
* HIV/AIDS, especially in TheEighties and TheNineties but continues to linger in poorer places to this day.
* The [[UsefulNotes/{{Chernobyl}} Chernobyl Disaster]] in 1986, which displaced a good chunk of the Ukrainian population overnight.
* Several cholera outbreaks over the course of history, including the one currently spreading through UsefulNotes/{{Zimbabwe}}, and more recently, UsefulNotes/{{Haiti}} as well. Cholera, smallpox, and other European diseases that wiped out nearly the entire Native American population.
%%* Arguably, the 2004 tsunami.
* Hurricane Katrina, which demolished much of the Gulf Coast of the U.S. and trashed New Orleans, and the damage is still being felt in the economy; the death toll, however, is more like a 0.0001. As a point of comparison, Katrina pretty much flattened an area the size of the UK, and knocked out power to an additional area about the size of France & the Benelux countries combined.
* Sadly, it seems like the 2010 earthquake that leveled Haiti has the potential to be this, compounded by the cholera outbreak and Hurricane Tomas.
* The [[ 2011 Tohoku Earthquake and Tsunami]] in Japan. The entire Sendai Region inundated with water plus the nuclear meltdown in Fukushima's Fukushima I power plant. Even with fewer deaths compared to Haiti's the year before, the devastation and possible radiation hazards have emptied out entire towns.
* It's predicted that thanks to GlobalWarming, the islands composing UsefulNotes/{{Kiribati}} will wind up totally flooded. The government is trying to convince Australia and New Zealand to accept the entire population as refugees. Other island nations such as UsefulNotes/{{Tuvalu}} and the UsefulNotes/{{Maldives}} may eventually suffer the same fate as well.
** That is the best case scenario. Worst case scenario: entire coastal cities like UsefulNotes/NewYorkCity, UsefulNotes/{{London}}, UsefulNotes/{{Shanghai}}, and UsefulNotes/{{Miami}}, as with entire agricultural regions like UsefulNotes/{{Bangladesh}} and the [[UsefulNotes/ModernEgypt Nile Delta]]. Ironically enough, because of their wealth the ones polluting the most will suffer the least.
** Indeed, global warming and it's various side effects could cause anywhere between a Class 0 to a Class 5 or 6, depending on how long it takes before humanity begins severely cutting down on carbon emissions or does some sort of geo-engineering. If action is done relatively soon (unlikely but possible) it could be kept to a low-end Class 0, if no major action is done soon it ''will'' be a Class 0, and the longer it takes, although it's unlikely it would get above 1 or 2 unless humanity is even stupider than it is now.
** It's not just sea level that's an issue with climate change; some simulations forecast that regions already at the upper edge of tolerable temperature-range for human habitation would need to be abandoned entirely, because it'll get too hot to ''breathe'' comfortably as weather extremes increase.
* On the end of the temperature spectrum, any future ice age (the next is due as early as 10,000 years or so) may cause glaciers to cover the entire Northern Hemisphere, rendering it uninhabitable because of the ice.
* Though it obviously hasn't happened to densely populated modern states (yet), certain potential natural disasters could reach this level: an unfortunately-placed flood-basalt release, a volcanic eruption nearing the lower margin of "supervolcano", or a megaflood on the scale of the Missoula Floods at the end of the last Ice Age. More fanciful concepts include a limnic eruption in which dissolved CO2 is released from a large lake (e.g. Lake Victoria or Lake Kivu), or a hypothetical release of dissolved hydrogen sulphide from the deeper waters of the Black Sea.