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OcTEARber 2025, Month challenge. by Lucasisverycool01
Fandoms: Undertale (Video Game), Undertale Multiverse - Fandom
21 Oct 2025
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Summary
This is a month challenge. However, some prompts are missing. I have combined it with another challenge I’m doing. I’m doing both a writing AND drawing one. I’m doing this over on Tumblr, my tag is the same as on here.
- Language:
- English
- Words:
- 11,242
- Chapters:
- 12/12
- Hits:
- 7
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Summary
Error doesn’t understand the point of carving pumpkins, but Dream’s smile makes him stay anyway.
[Flufftober - Day 21: Pumpkin Carving]
Series
- Part 61 of Undertale Fics
- Part 71 of One-Shots / Two-Shots
- Part 9 of Prompt Fics
- Language:
- English
- Words:
- 578
- Chapters:
- 1/1
- Hits:
- 0
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Summary
Every year on the anniversary of the Truce between the Bad and the Star Sanses Nightmare hosts a party at the castle for all to attend. We meet the players in the party.... At the end an unexpected guest to the multiverse makes their apperance....
The tags will constantly be updated as the story goes
Series
- Part 2 of Into the Multiverse
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Summary
A sweet little series set in a world where monsters had been captured from the beginning instead of shoved underground.
Eventually, as the years and generations pass, both humans and monsters slowly forget the monsters were ever free.
We follow the story of an aging little zoo hoping to expand and take in a few monster pups. And the stories of several monsters who find themselves being transferred to the place.
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Summary
You died.
Plain and simple, one moment you were there, strapped to the table in that ever so dark laboratory. Then a loud cracking had occurred - the sound of your own soul giving up. It had been deafening, like ice breaking beneath your feet. That purple crystalline heart shattering like fragile glass, unable to persist any longer.
The testing had been too much for you, not even you could persevere through it. Not after months—years.
You…died?
Then why were you here? More importantly where? What had
Gasterdone? And why did reality seem to glitch in and out with every painful thrum from where yoursoulshould be? And who were these skeletons that felt oddly familiar to yoursoul.>> Persevere?
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Welcome to my head by Doris_LOVE_my_Bear
Fandoms: Original Work, Multi-Fandom, Five Nights at Freddy's, 惊悚乐园 - 三天两觉 | Thriller Paradise - San Tian Liang Jiao, OMORI (Video Game)
21 Oct 2025
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Summary
This is a story about a group of broken people, simply existing together—breathing, interacting, without even forcing you to relax.
Most of the characters chosen for this story come from source materials that already involve severe trauma.However, there will be no further depictions of gore or violence in this story.
And there will absolutely never be any sexual innuendos.(Off-colour jokes, if any, will be strictly adult-to-adult—and never flirty.)That said, since I tend to let characters actively explore their own trauma, there may be mentions or descriptions of past events. (Which is why I’ll include trigger tags in the notes below.)
Don’t worry, there won’t be any cross-universe romantic ships.
Some Original characters appear in here, but the majority of characters in this story do not belong to me.If you feel a character seems a little out of character (OOC), feel free to bring it up, and I’ll consider making adjustments.
However, if it’s only a slight difference, it might simply be due to different interpretations—after all, “There are as many Hamlets as there are readers.” -
A game for the Admin by Lunaria_maharlika
Fandoms: Undertale (Video Game), Underverse - Fandom, Xtal, Xtale - Fandom, underswap, Dreamtale - Fandom, AU - Fandom
21 Oct 2025
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Summary
Boredom.
Boredom was what lead to all of this.
Cross, the admin, had decided that he was bored and wanted to play a game with the people in his multiverse.
The game of balance.
The game of balance between, positivity, negativity, creation and destruction.
It doesn't matter what happens, how many people and monsters get killed or the amount of AU's his game will destroy.
In the end, he will still be the hero of this-HIS multiverse.
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Summary
Some nice feral writing with Cross and Nightmare
Question: how do you make monsterfucking make sense when you write about magical skeletons?
Answer: make one into an eldritch being too terrifying to comprehend were you to see his true formAlso, the gore and violence warning is for a small part at the end of second chapter of this that I added as a bonus for those curious enough how Nightmare planted his seeds in previous sacrifices
Series
- Part 21 of Kinktober 2025
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Hello, my dear dinosaurs! I'm White Angel 2010. This fanfic will be a script for my comic, which I will publish on Wattpad and Tapas. The chapters there will be in spanish (because I'm Mexican, lol :b). It is inspired by Staringback's work, "Sooner Or Later You're Gonna Be Mine." Please follow her (and Melikas on Tapas, because she did an amazing job turning that masterpiece into a comic). Well, that's all, thanks for choosing to read this work and have a nice day :3
"𝓘𝓷 𝓽𝓱𝓮 𝓭𝓪𝓻𝓴𝓷𝓮𝓼𝓼 𝓽𝓱𝓪𝓽 𝓽𝓻𝓪𝓹𝓼 𝓪 𝓬𝓸𝓻𝓻𝓾𝓹𝓽𝓮𝓭 𝓶𝓪𝓷, 𝓽𝓱𝓮𝓻𝓮 𝓲𝓼 𝓪 𝓵𝓲𝓰𝓱𝓽 𝓽𝓱𝓪𝓽 𝔀𝓲𝓵𝓵 𝓰𝓾𝓲𝓭𝓮 𝓱𝓲𝓶 𝓽𝓸 𝓹𝓪𝓻𝓪𝓭𝓲𝓼𝓮 𝓪𝓽 𝓽𝓱𝓮 𝓬𝓸𝓼𝓽 𝓸𝓯 𝓱𝓮𝓻 𝓸𝔀𝓷 𝓯𝓵𝓪𝓶𝓮. 𝓟𝓸𝓸𝓻 𝓰𝓪𝓻𝓭𝓮𝓷𝓮𝓻... 𝓱𝓮 𝔀𝓲𝓵𝓵 𝓵𝓸𝓼𝓮 𝓱𝓲𝓼 𝔀𝓱𝓲𝓽𝓮 𝓻𝓸𝓼𝓮 𝓱𝓮 𝓵𝓸𝓿𝓮𝓭 𝓶𝓸𝓼𝓽 𝓲𝓷 𝓽𝓱𝓮 𝔀𝓸𝓻𝓵𝓭 𝓪𝓽 𝓽𝓱𝓮 𝓬𝓸𝓼𝓽 𝓸𝓯 𝓱𝓲𝓼 𝓯𝓻𝓮𝓮𝓭𝓸𝓶..."
Series
- Part 1 of MafiaFell AU's
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Summary
I ran out of tag room, so it’s being split up! Hope you enjoy nonetheless!
Series
- Part 2 of Cactus’ Kinktober 2025
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How many runs has it been?
Not even Chara could count them. Over and over again, they saw the Human kill those they had cherished when they were alive. They had wished to do something about it, and had even suggested to the Human to pick another route only to be in vain. However, when an intervention comes from the Man who Speaks in Hands, they are given an opportunity to give one being the memories of the previous routes.
Garden of LOVE(Level of ViolencE) is a three part series and take on the already popular concept of Dusttale. In the series, Sans's memories are given back to him by Chara who aims to stop the Human's genocide routes.
Series
- Part 1 of Garden of LOVE
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Gonna try my hand at this for the first time! These will all be Sans/ Reader, but might play around with various AU's I don't normally mess with.
Might also sneak some canon or not canon scenes in here from my fics if they fit hehehe.
Also going to try to do some of these with Gender Neutral readers, which I am not very good at but gonna get some practice in! GN Reader will stand for Gender Neutral reader.
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Blood and Determination - Scrim sans' backstory by Ratking_mischief
Fandoms: Undertale (Video Game)
21 Oct 2025
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Summary
Just the backstory and history of my sans OC, Scrim (Scrimshaw).
- Language:
- English
- Words:
- 1,813
- Chapters:
- 1/?
- Hits:
- 2
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Summary
Gather children, listen well, harken to the Under Tale.
A story of a small child, falling into a massive cavern where monsters have made their home. With the help of a certain phantom, the child makes their way through the Underground, making friends & family along the way.
I own absolutely nothing in this. Undertale, along with with characters, setting, etc., belong to its respective owners, who are not me.
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Without History (maybe some things should stay forgotten) by Human_with_no_life
Fandoms: Undertale (Video Game)
21 Oct 2025
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Summary
After the barrier breaks, Monsters and Humans have learnt to live together on the surface, there is still many mysteries hidden in the underground. Most of them will stay forgotten or buried forever.
Until a ‘promise’ Sans made with Frisk leads to him telling a long and complicated story. His story, well not exactly 'his', but with as many questions as it answers, it seems to raise more. One thing is for sure; this tale will change everything.
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One day, you meet a skeleton. He's strange yet funny, easy to get along with. A few days later, you meet him again. You don't remember him, but he remembers you. He remembers every time you two first met. It's eating away at him, and you're none the wiser. Is it even worth telling you? Wold you believe him?
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Killer piensa que cada una de las decisiones que ha tomado hasta ahora han sido las incorrectas, pero aún así acepta el trato con el guardián de Au's, quién tiene la teoría de que el asesino puede redimirse si está dispuesto a cambiar.
Le entrega viales con la esperanza de que sentir algo nuevo lo motive a superarse y le regala un diario para que escriba en él.La historia está narrada en base a lo que él escribe ahí con excepción de uno que otro capítulo extra desde la perspectiva de otros personajes...
Intento apegarme lo mejor que puedo al canon de cada personaje...sus personalidades, ideales e historia, pero obviamente, por mera ficción, hay cosas que salen de eso.
- Language:
- Español
- Words:
- 6,418
- Chapters:
- 4/?
- Hits:
- 23
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Here Comes the Bride by FandomWorld9728
Fandoms: Undertale (Video Game), Underfell - Fandom, Underswap - Fandom, Swapfell red - Fandom, Fellswap Gold - Fandom, Horrortale - Fandom, Underlust - Fandom
20 Oct 2025
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Summary
You were so excited to finally get married to your long time fiancé, only for him to leave you for another girl with nothing but a note. Lucky for you, your two best friends were there to help you through this rough patch of your life.
Series
- Part 12 of Undertales Across the Multiverse
- Part 8 of Papyrus/Reader Fics
- Part 8 of Sans/Reader Fics
- Part 1 of Here Comes the Bride
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Rainbowtale by Spring_Winter201013
Fandoms: Undertale (Video Game), Underverse-dreamtale, Underverse-Rainbowtale
21 Oct 2025
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Summary
"During Rainbow!Sans's brother's party, Rainbow decided to leave and calm down. As it turned out, someone had been watching his every move, a slimey black skeleton, Nightmare, offering a deal that Dream rudely interrupts. Will Rainbow accept this mysterious offer, even after Dream's warnings? Will Nightmare go through with his deal and hold true to his word?"
- Language:
- English
- Words:
- 1,474
- Chapters:
- 1/1
- Hits:
- 2
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Summary
_.;⊛;._
Após serem trancafiados em um subsolo completamente desconhecido e repleto de mistérios e abismos perigosos, os monstros puderam finalmente sentir o gosto da paz. Porém, para os humanos, a herança da guerra se manteve e espalhou-se por toda a superfície, graças à ganância dos reis, trazendo morte e destruição para os mais fracos.Frisk, uma pobre criança assolada pela guerra em que nasceu, fora obrigada a fugir de seu vilarejo destruído para o Monte Ebott, mas, por causa de um descuido - ou talvez obra do destino-, teve sua história ligada às dos monstros e de seu passado.
Sua vida nas mãos daqueles que juraram vingança à sua espécie. Como tudo se desenrolará no fim?
_.;⊛;._
"✞⚐👍☜ ☠✌⚐ 🏱⚐👎☜ ☞🕆☝✋☼ 👎⚐ 💧☜🕆 👎☜💧❄✋☠⚐"
"Jamais..."Obs cronológica: Esse universo alternativo se passa antes de Lewstale (uma outra au minha) e os personagens que nela aparecem ainda não tiveram contato com nenhuma au.
_.;⊛;._
Universo alternativo de Undertale (by Toby Fox)
As capas dessa história, tal como a história em si é de minha autoria. Tenha uma boa leitura. :)
_.;⊛;._
- Language:
- Português brasileiro
- Words:
- 18,510
- Chapters:
- 1/11
- Hits:
- 2