History ApocalypseHow / Class4

20th May '17 10:20:12 AM nombretomado
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* The Armageddon spell in ''{{Franchise/Ultima}}'', which is described in the fluff as destroying all life in the world, and when actually cast instantly kills all [=NPCs=]. Depending on the game, there may be two or three survivors, usually the [[PlayerCharacter Avatar]] and [[BigGood Lord British]].

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* The Armageddon spell in ''{{Franchise/Ultima}}'', ''{{VideoGame/Ultima}}'', which is described in the fluff as destroying all life in the world, and when actually cast instantly kills all [=NPCs=]. Depending on the game, there may be two or three survivors, usually the [[PlayerCharacter Avatar]] and [[BigGood Lord British]].
27th Feb '17 10:21:38 PM Discar
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* ''Literature/WeAreLegionWeAreBob'': When the Brazilians fired on the HEAVEN-1, this started a war. Every nation got involved, and China eventually destroyed Brazil by dropping asteroids on them. Riker and Homer arrive just as the last Brazilian warships are preparing to drop asteroids on what's left of China, which would render the Earth uninhabitable in weeks instead of decades. Once the warships are dealt with, Riker works to evacuate the fifteen million survivors, since it will take ten thousand years for Earth's biosphere to recover.
19th Jan '17 8:51:16 AM sipperandal
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* The hallucinogenic fungus in ChildOfEarth ends up spreading to all organic matter until the mold growth is all that remains, having become the titular Child of Earth. (It's also speculated by characters that the lifeform first came to Earth as a remnant of a [[ApocalypseHow/ClassX Class X]] event elsewhere in the universe.)
21st Dec '16 10:56:38 PM BattleMaster
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** The Cretaceous-Paleogene (earlier known as Cretaceous-Tertiary) Extinction is the most famous. Probably caused by an asteroid impact, it killed 75% of all species, including the Dinosaurs.

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** The Cretaceous-Paleogene (earlier known as Cretaceous-Tertiary) Extinction is the most famous. Probably caused by an asteroid impact, impact though climate change and mass volcanic eruptions may have also played a role, it killed 75% of all species, including the Dinosaurs.non-avian Dinosaurs, large marine reptiles, and pterosaurs.
25th Oct '16 7:38:54 AM VPhantom
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* ''YTheLastMan'' is a 3.5, as every male ''mammal'' on the planet dies, save for Yorick and his pet helper monkey and two male astronauts in space. The cause has been vague, but options include an ancient curse or a [[ScienceIsBad biological experiment gone wrong]]. The comic even mentions that, 7 months after the disaster struck, the first species has gone extinct as its reproductive cycle has flown by. It should be noted that the actual short-term effects look more like a Class 1. The looming fact that this is the last generation as far as most of humanity knows barring serious reproductive breakthroughs is anything but glossed over. [[spoiler:Thankfully, in the DistantFinale, we see that Dr. Mann's cloning research has paid off, and it looks like humanity has made a mostly complete recovery -- complete with roughly the same political problems as before -- making this a Class 1 with a recovery period in the decades.]] In addition, [[spoiler:even after rats should have died out with no males to propagate the species -- almost five years on -- some are seen on the streets of Asia, which stuns Mann.]]

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* ''YTheLastMan'' ''ComicBook/YTheLastMan'' is a 3.5, as every male ''mammal'' on the planet dies, save for Yorick and his pet helper monkey and two male astronauts in space. The cause has been vague, but options include an ancient curse or a [[ScienceIsBad biological experiment gone wrong]]. The comic even mentions that, 7 months after the disaster struck, the first species has gone extinct as its reproductive cycle has flown by. It should be noted that the actual short-term effects look more like a Class 1. The looming fact that this is the last generation as far as most of humanity knows barring serious reproductive breakthroughs is anything but glossed over. [[spoiler:Thankfully, in the DistantFinale, we see that Dr. Mann's cloning research has paid off, and it looks like humanity has made a mostly complete recovery -- complete with roughly the same political problems as before -- making this a Class 1 with a recovery period in the decades.]] In addition, [[spoiler:even after rats should have died out with no males to propagate the species -- almost five years on -- some are seen on the streets of Asia, which stuns Mann.]]
27th Sep '16 2:44:33 AM Morgenthaler
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* ''TechInfantry'' has a meteor impact do this to the planet Earth, although it is eventually resettled by humans and other life from colony worlds. Then it later gets destroyed in even more spectacular fashion.

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* ''TechInfantry'' ''TabletopGame/TechInfantry'' has a meteor impact do this to the planet Earth, although it is eventually resettled by humans and other life from colony worlds. Then it later gets destroyed in even more spectacular fashion.
4th Sep '16 12:27:57 PM Hanzousama
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** ** [[https://en.wikipedia.org/wiki/Great_Oxygenation_Event The Great Oxygenation Event]], [[ExactlyWhatItSaysOnTheTin in which the appearance of oxygen in the atmosphere]] resulted in the death of many anaerobic multi-cellular organisms]].

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** ** [[https://en.wikipedia.org/wiki/Great_Oxygenation_Event The Great Oxygenation Event]], [[ExactlyWhatItSaysOnTheTin in which the appearance of oxygen in the atmosphere]] resulted in the death of many anaerobic multi-cellular organisms]].organisms.
29th Jul '16 6:34:13 AM LadyJaneGrey
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* In the ''TabletopGame/DungeonsAndDragons'' Splat book Elder Evils, this is the most likely worst case for three scenarios:

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* In the ''TabletopGame/DungeonsAndDragons'' Splat book Elder Evils, this is the most likely worst case for three four scenarios:


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** Leviathan's scenario would cause whole continents to sink into the sea, destroying civilized areas; the ecosystem would mostly survive, but not much else. In fact, by the time its Sign reaches Overwhelming (right before the FinalBattle) a Class 1 has already occurred, but hope for recovery remains should the heroes defeat the beast.
28th Jul '16 3:48:18 PM LadyJaneGrey
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28th Jul '16 3:41:07 PM LadyJaneGrey
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* In the ''TabletopGame/DungeonsAndDragons'' Splat book Elder Evils, this is the most likely worst case for two scenarios:

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* In the ''TabletopGame/DungeonsAndDragons'' Splat book Elder Evils, this is the most likely worst case for two three scenarios:


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** Worst case scenario for the Ragnora would make the world ''better'' suited to support life in general, but the corrupted positive energy caused by the abomination would be "too much of a good thing", causing most species who didn't die from it outright to mutate into horrid, mindless, pseudonatural beings.
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http://tvtropes.org/pmwiki/article_history.php?article=ApocalypseHow.Class4