The Fallen World Chronicles
Terminology
Fallen World: World or universe, that had their civilization/s or environment/s destroyed by individuals from YGGDRASIL (players, NPCs and/or monsters).
Note: The background of this series of oneshots is to show what happens when a world doesn't simply get conquered by a YGGDRASIL player, but actually destroyed as it is the easiest yet less efficient way to conquer a world. When an individual gets transported into another world through the means of YGGDRASIL things can go down three paths.
First is when said person makes a positive change for the world like actually bringing progress and prosperity to the people and thus leaves a good impression of themselves in history. Such people would be hailed as heroes or legends or even gods like we see it for the 6 Great Gods of the Slane Theocracy. Don't get me wrong, I absolutetly despise that xenophobic world picture of them, that seems to picture mankind as the rightful rulers of all creation, but they probably did do some good for mankind when they are hailed as gods by them like protecting them from all those rather aggressive demihuman tribes that are still roaming their territory.
Second is when they don't make a change on that world. If a world has already magic and mythical beings or has a power scaling beyond that of Level 100 YGGDRASIL players, those people are probably not going to change much or not even appear in historical records. That of course can also happen when these beings for examply chose a solitary lifestyle away from civilization, when all their traces are erased like through the ruin of a civilization they helped to raise or when said individuals simply die before having the chance to be remembered for anything.
This is something that can happen very likely on any world asit depends on all kinds of factors like geography, location during the transition, local fauna and flora, local sentient beings, demographic distribution, magical and technological advancement and the list goes on and on. For example a world with residents, that could just crush an YGGDRASIL player without much effort would basically only remember them as some sort of strange being at best and those beings would probably fade from the memory.
The third way is when these people would commit all sorts of atrocities such as enslavement, murder, rape, genocide and so on for inmorale reasons like suddenly receiving the bodies and powers of their game avatars or in the case of NPCs and monsters suddenly becoming real and acting according to their lore and personality. Basically if Ainz was to suddenly die alongside all of Nazarick by the time shortly after the battle of Katze Plains, he and all his followers would only be remembered by the people as some sort of monsters with him at the top as the monster, that killed thousands with a single spell and all his positive achievements would be denied or not recognized by most of the people as the majority of the Re-Estize Kingdom wouldn't hail a monster friendly that wiped out their army and their champion and national hero Gazef Stronoff and the Slane Theocracy already has something against anything that isn't human, so it is very likely that like with the tales of the 13 Heroes that the tales will be bent in favor of humanoid races.
Another example would be when individuals from YGGRASIL destroy entire landscapes, kill many people, enslaves locals or brings down entire countries. Such individuals would be remembered as monsters even if they were human. Of course, this would also depend on the individuals and what they would do afterwards. Ainz would not only be remembered as a coldblooded monster as he rose his kingdom to power and prosperity. By his people he'd be hailed more as a great king though NPCs could easily warp that view into that of a god.
Making history is of course never truly objectively made. It depends on the people that write it down and usually such people picture themselves as just and their enemies as the evil ones of the story.
For this series I will put down some guidelines or rules if you will for the coming chapters.
1. I will not guarantee to include franchises on the suggestion of the readers. If you want make suggestions, you are more than welcome to do that. However, I can't tell if I would make a chapter for that or not. It's possible, but I can't promise you anything.
2. I will not include franchises that I have not watched, read or played completely or don't know anything about at all.
For example, High School DxD. The first episode was enough already to chase me off and never come back, because it simply would have been too awkward for me to watch it. By the way the same also goes for Aesthetica of a Rogue Hero and Testament of Sister New Devil. One episode and I was done with them. I never did any research on those shows afterwards. Not even to figure out why they were popular in the first place.
Another case would be that I never watched My Hero Academia or Demon Slayer, which both have quite the hype going on, yet I don't really plan to watch them any time soon. I can't really explain it but even when recommended I just don't feel like watching them.
So if someone happens to suggest them, my hands are tied because I simply didn't watch them. Then again I doubt anyone of you would want those series in a collection like this one.
A last example for this rule, Gears of War. I have never played a single game of the Gears series. Never have and probably never will, because I'm really, REALLY bad in first person shooters and shooter games in general. The same goes for Metal Gear Solid, Resident Evil or Halo. I never even touched those games and thus I know only very little about them.
3. I will not include franchises that powerwise are too powerful to receive actual damage by such individuals. The red thread that will go through all those stories is that somehow there will be brought destruction to something of a large scale, thus the name Fallen World Chronicles. It would literally make no sense to name the collection like that if I included a franchise or multiple one in this series, that cannot be harmed by such individuals.
For example, I cannot destroy Death March with such individuals since the sheer impossibility to kill Satou unless you have a suitable world item, cheat code or ability to completely overwrite his abilities, including his ability to resurrect even when killed, which alone is already virtually impossible. So since those abilities are so far are all nonexistent in the Overlord franchise and I personally doubt that they will be added, that series won't be here. I get he's a game developer, but he didn't create the world he was sent to, so those admin level powers are not even justified by that.
Another example, I cannot destroy One Punch Man since even if a player of the same level as Momonga would try [Grasp Heart] on Saitama, it is most likely that they would break their own hand in attempt to crush his heart. It would be literally like Jade trying to wake up Kongou-sensei in Houseki no Kuni.
Note here, that I only brought up One Punch Man, because I lacked examples.
If a franchise, however, is powerwise usually not stronger, yet features stronger characters like for example One Piece before the timeskip when individuals like Whitebeard had been more of a rarity and not basically the norm, they could be featured.
4. None of the OCs you'll see from YGGDRASIL here will have multiple chapters. This is a oneshot collection for a reason and they don't get a second chapter in this collection. So I'll try my best to construct a fitting conclusion for each chapter respectively.
If you want to see more chapters of one scenario or another constellation of player(s), NPC(s) and/or monster(s) to wreck a world in an actual story, you'll have to write it yourself or convince someone else to do it for you. You may as well use this as inspiration to write your own stories. And if you just want a oneshot idea of yours featured in this series, you are always welcome to do so, but I can't promise anything.
Also a last note at the end, this series is not purely composed out of simple hate fanfictions just because I don't like certain franchises or because I like dark stories (which I don't) or because I think that Overlord is superior to all other universes.
It is to show that there are simply some worlds that powerwise are too weak to withstand the power of a single person or monster from YGGDRASIL, when that individual has a more destructive and evil nature or when the world itself pushes such people so far that they resort to such actions.
Not one of these scenarios is either meant as an offense against fans of the featured franchises nor does it mean that I essentially have to dislike every featured franchise without exception. They simply got thrown into the mix, while I was looking through everything I have watched, read and played over the years and haven't used for a story already...
Maybe I should clean up for once and throw away all those old games I can't play anymore... BUT THAT'S BESIDE THE POINT HERE!
I apologize right away for the case that the oneshots should offend you, because it features a franchise that you like, kills a character that you like or any other reason. Nothing of this is meant as an insult to neither the makers or the fanbases.
With that I hope you will enjoy the following chapters.
Disclaimer: I own absolutely none of the featured franchises. All rights belong to their respective owners and them alone.