History ApocalypseHow / Class6

* Scientists predict that the Sun's luminosity gradually increases; in about a billion years, Earth will become too hot to sustain life[[note]]''Complex'' life at least, that could last some more time (1.2 billion years). Simple lifeforms -- bacteria and the like -- may last until 2.8 billion years in the future[[/note]].
** Possible example of what the future may hold for Earth: our nearest neighbour, Venus.

* The world of ''VideoGame/HorizonZeroDawn'' seems at first to be the results of a Class 2 apocalypse; there are primitive tribes of humans as well as natural flora and fauna, [[spoiler: but the world has actually gone through a full Class 6. The RobotWar completely destroyed all life on earth, and only after said robots were shut down was life re-seeded across the globe.]]

* ''VideoGame/IslandsOfWakfu'': : At the end of the game, [[spoiler:Nora]] inflicts a WorldWreckingWave on the World of Twelve to stop Orgonax, wiping out all life on the planet for the next several millennia.

** [[spoiler:The Omicrons, the selfsame machine lifeforms that invaded the dragons' homeworld and created Omega. So fearful were the Omicrons of being invaded that they sought to become the invaders instead, converting their entire population into robots and machines for the sole purpose of invading other worlds, and taking what they learned from their victims to improve themselves further. Unfortunately, [[AndThenWhat they did not account for what they would do ''after'' becoming the most powerful beings in the universe.]] Realizing this, the machines that directed the Omicrons shut down, and the population entered a permanent state of standby.]]

* Myth/EgyptianMythology: The [[ReptilesAreAbhorrent snake god Apep]] wants to kill the Sun God Ra and put out the sun. This would kill off all life on Earth.

* One Sunday story in ''ComicStrip/CalvinAndHobbes'' has Calvin writing a story as a homework assignment in which [[AlienInvasion aliens invade Earth]] and suck up all of the atmosphere. They're fast enough to do this in the time it takes for them to finish explaining what they're doing. In practice, this would near-instantly kill everything except tardigrades and some extremophiles, but with no other biosphere, their time would be short too

* [[http://grupos.emagister.com/imagen/genesis_por_quino/t142192-0.jpg This strip]] from Argentinian cartoonist Creator/{{Quino}} creates a pseudo-Biblical "Genesis of the End" regarding mankind performing a planetary ecocide.

* In ''Podcast/GuidersOfOurDreams'', Eclipse, the villain destroys the atmosphere of Earth, and creates a new planet called Skiya.

* ''Literature/DeadworldIsekai'': The titular Deadworld, described in the story blurb as "a sterilized, featureless wasteland" and as described in Chapter 3:

** The Republic, Separatist, and Imperial Order Base Delta Zero, an orbital bombardment which comes in two main flavors. The quick and dirty version is a Class 3 that involves destroying all cities, industrial assets, infrastructure and people, with droid potentially being captured instead, and can be executed by a handful of Star Destroyers in a matter of hours barring resistance and may include surface landings to conduct mop-up operations. The second variant is Class 6, frequently cited as calling for a fleet of ships to melt the planet's crust to a depth of 1 meter. Ultimately, how much it falls between these two categories depends on how many fleet assets are available, how pressed for time the commander in charge is, and how vindictive he is feeling when carrying out the order.

** The Republic, Separatist, and Imperial Order Base Delta Zero, an orbital bombardment which comes in two main flavors. The quick and dirty version is a Class 3 that involves destroying all cities, industrial assets, infrastructure and people, with droid potentially either being captured instead, and can be executed by a handful of Star Destroyers in a matter of hours barring resistance and may include surface landings to conduct mop-up operations. The second variant is Class 6, frequently cited as calling for a fleet of ships to melt the planet's crust to a depth of 1 meter. Ultimately, how much it falls between these two categories depends on how many fleet assets are available, how pressed for time the commander in charge is, and how vindictive he is feeling when carrying out the order.

** The Republic, Separatist, and Imperial Order Base Delta Zero, an orbital bombardment which comes in two main flavors. The quick and dirty version is a Class 3 that involves destroying all cities, industrial assets, infrastructure and people, and can be executed by a handful of Star Destroyers in a matter of hours barring resistance and may include surface landings to conduct mop-up operations. The second variant is Class 6, frequently cited as calling for a fleet of ships to melt the planet's crust to a depth of 1 meter. Ultimately, how much it falls between these two categories depends on how many fleet assets are available, how pressed for time the commander in charge is, and how vindictive he is feeling when carrying out the order.

** Some of the Lostbelts in Part 2 also have gone through or will go through apocalypses, as well. For example, the Indian Lostbelt is doomed to eventually become a Class 6 because the BigBad there is so determined to erase whatever he deems "evil" every ten days, and his standards are simply too high for humans (and other kinds of life, as demonstrated with Asha's dog) to ever possibly meet.