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Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
20 Oct 2025
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Summary
New kinktober! One chapter a day for the entire month!!! With a list I made myself, very excited to show everything I've written.
Just like the other ones every chapter contains some form of hypnosis/mind control/brainwashing. I'll do my best to tag but i can't tag absolutely everything so look at the warnings at each chapter or in the table of contents.Series
- Part 14 of Undertail hypnosis series
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With the two royal leaders, Nightmare and Dream, learning how to work together to run their kingdom, they decide to entrust their royal guard, Cross to help train their new guard. The land shows peace, but you never know what will be just over the horizon.
- Language:
- English
- Words:
- 3,417
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 13
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We're back with another year of Inkwhumptobertale!
And this year, we have another twist: another list! That's right: every day, I'll be facing the challenge of eight different unrelated prompts, and I'll have to do my best to cram them all into the story, somehow. Admittedly, there is a low chance of me actually doing that, but I am obligated to use at least three prompts each day, and I'll add more if possible. I'd like to do at least one day fitting all eight prompts into the story at some point in the month, though. So..prepare for chaos!
These characters are not mine!
Series
- Part 4 of Writing Prompts
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✨
He skidded to an unsteady halt as he finally got a close look at the two passed out Skeletons.“What the fuck?”
Blue didn’t swear often, but this? This definitely merited it.
✨Error and Ink are caught in a …little… accident and now everyone else is left to deal with the aftermath.
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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:
- 5,403
- Chapters:
- 3/?
- Hits:
- 20
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After a truce was decided in the multiverse Error becomes increasingly frantic until he finally shattered the truce by destroying an au of OuterTale
Though nobody could imagine why.
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The whiteness greeted you as you woke up again. It felt almost suffocating, especially when the only other people with you didn't exactly look or act normal. You just wanted them to emote, even a little bit.
All you wanted was to not be alone but no. You were reborn as Ink after you died in a lonely ditch. Now you have to navigate the vast Multiverse with your knoweledge of your last life. As you get friends and foes alike, you notice that not everything you know is trustworthy. Especially when you're a little lost skeleton with questionable ability to feel.
After all, anything could happen in a place this big.
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A mix of fluff, angst, and crack! Universe and genre used will be in each chapter's author note, along with chapter specific warnings.
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A wish for connection that would never be, for all that he would receive from that loveless relationship was the act of twisted desires. Manipulated into committing heinous acts. Error was doomed from the moment he uttered “I love you” Oh how he began to loathe those words.
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Cross develops a terminal Soul disease, but his father only cares about his own reputation as a stellar Medical Scientist and uses his son(s) as lab rat to find a cure.
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- Part 7 of Nightmare's Clan
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Saffron, the son of King Nightmare and his harem, has always felt a strong connection with nature. Now that he’s nine, he’s allowed to go on camping trips. What could possibly go wrong?
(My Halloween story. Updates every Saturday of October.)
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Disclaimers:
Several details in this fic are heavily inspired by 'Blue joins the bad sanses' comic, so go check that out
Canon innacuracies: Passive and Corrupted Nightmare are the same person, Ink is the creator and not the protector, Ink, Error, Nightmare, and Dream, are all gods, Blue, Killer, Horror, and Dust's specific au timelines were all destroyed, and i took liberties with how the void works. Also, no Cross sans will be mentioned, i don't know enough about underverse, and there will be some OC non-sans God/entity/things later on. The fic will be split into parts, each lasting nine chapters.
Schedule: Once a week, on Saturday, Sunday, or Monday, and i will post art or a reference sheet with every chapter. Trigger warnings will be specified in chapter notes. I've never written for undertale before, so please let me know what you guys think :3With that said, the actual plot: After an injured Error crashes into Nightmare and Co's home, a close bond starts to form between the two gods, both forced villains. In light of Ink's attempt to kill Error, Dream finally starts to lose it, and Blue gets dragged along.
Average chapter length is 500-2000
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A Willing Sacrifice (or, Reader is a Juicebox) by wishbonewhispers
Fandoms: Undertale (Video Game)
18 Oct 2025
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Summary
This is a bad idea.
You know it is, but you can’t help that you really, really like this guy, and that causes you to make thoughtless decisions, like letting him get you lost in his castle.
(or, in which the reader seeks out the vampiric lord of the manor, Nightmare, for his regularly scheduled feeding time.)
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The god of death never liked children.
He didnt like people, he didn't like the thing that calls itself his brother even though its just one of many, he doesn't like rules, he doesn't like his king.
But most of all, he never liked children, he hates work. And children are work, that's all they are.
So no, he doesn't feel paternal to the little runt that just happens to look similar to him. Don't ask him again, and also, he will NOT be giving it up. Its his now. Even if he doesn't want it.
- Language:
- English
- Words:
- 878
- Chapters:
- 1/?
- Kudos:
- 2
- Hits:
- 34
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Dualtale AU: Two sides of truth by ED_Soul
Fandoms: Undertale (Video Game), Underverse (webcomic)
18 Oct 2025
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Summary
Description:
This story is based on the distant and little-known Dualtale AU,where nothing is as simple as it seems. In this world, unlike the original Undertale, monsters were never trapped underground. But what was the price for peace between humans and monsters? And how is it connected to XGaster, when these events unfolded long before the X-Event?
(Features characters from Underverse and Undertale,adapted for this story.)Author's Note:
In the Dualtale AU,the famous rule "Kill or Be Killed" is replaced by another:
"Speak out, and you will be silenced."
This is a universe built on lies and dark secrets that everyone holds.Every character has their own agenda and their own rules and it's better not to try and learn them.Series
- Part 1 of Dualtale AU: Two sides of truth
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As Killer falls deeper and deeper in love with Cross, the others begin to notice his decline.
Series
- Part 7 of The World Ended When It Happened To Me
- Language:
- English
- Words:
- 442
- Chapters:
- 1/1
- Kudos:
- 13
- Hits:
- 83
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It was all a struggle as Nightmare formed a team from the ground up. For 500+ years, the voice in his head pestered him, nagging him to continue this path. He begins to question all he was taught once he meets someone new and finds someone familiar.
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Please note: English is not my first language. Thanks for understanding.
In a multiverse built on creation and destruction, timelines flow according to unchangeable laws. As resets repeat, 'anomalies' begin to appear, threatening the very existence of AUs. Ink, the AU guardian, struggles to maintain order while navigating conflicts with troubles and protecting his friends. Amidst uncertainty, trust and reliance between him and Dream deepen, revealing hidden vulnerabilities and the weight of past failures.
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Now that Cross was finally back, Killer was never letting him leave his side again.
Series
- Part 6 of The World Ended When It Happened To Me
- Language:
- English
- Words:
- 487
- Chapters:
- 1/1
- Kudos:
- 9
- Hits:
- 92
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Killer had his babybones, Crescent, very recently. This seemed to have just amplified his own selves instincts up to 100.
But,when Dream eats a negative apple,band becomes shattered..
Nightmare had changed too..
Passive didn't remember him. Passive was never him.
He attempts to join shattered, to keep his child safe. But shattered didn't want to risk killer's life.
So he advised killer to leave this multiverse, and find a safer one. For his and his child's sake.
He travels and finds many, many multiverses that wouldn't take him..or his child.
But, when he accidentally falls into a portal, leading to a nightmare variants home...
Will he find himself a home there?
Or will he and his child have to keep looking?
Series
- Part 1 of Multiversal chaos:)