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Sick To Death (Of Me Chasing You) by CrossoverAU
Fandoms: Undertale (Video Game), Alice by Heart - Sheik/Sater/Sater & Nelson
24 Jun 2025
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Summary
Raine was sick. Really sick.
The kind of sick where, despite not knowing what she had, she knew she didn't have long left.
Her best friend Sans knew that too.
Not wanting her to live her last moments trapped in her house, Sans read her one of her favorite stories, Alice in Wonderland.
While chasing her through the pages, Sans learns that he loves her too much to let her die.
Will he be able to let her go or will he try to selfishly stop the clock?
Aka an Undertale/Alice By Heart crossover fic because I couldn't find one
Note: knowledge of Alice By Heart isn't needed to read this fic!
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Underune by Angel_Crafter, Lord_Obvious_Of_Duh
Fandoms: Undertale (Video Game), Deltarune (Video Game)
24 Jun 2025
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Summary
When Deltarune characters and Undertale characters meet together.
This is literally my third attempt.
Somewhat inspired by Deltatraveler.
All characters belong to Toby Fox
- Language:
- English
- Words:
- 2,617
- Chapters:
- 1/?
- Hits:
- 0
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The Determined Descender by TheSadman
Fandoms: 原神 | Genshin Impact (Video Game), Undertale (Video Game)
24 Jun 2025
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Summary
The story of Teyvat was etched in stone.
The gods and Celestia, the dragons and their long history, and the Descenders, those who possess a power that can rewrite the fate of the world.But what happens when a new Descender appears, a traveler whose SOUL blazes with a DETERMINATION this world has never known?
Follow Frisk as he journeys across the seven nations of Teyvat.
Will he offer the world MERCY, or will his choices plunge the land into a catastrophe even worse than Khaenri’ah?____________________________________________
A Genshin Impact x Undertale fanfic.
*UNDERTALE SYSTEM! No Undertale Characters (Except technically Frisk)
*OC Frisk, not canon Frisk! -
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Summary
After almost eighty-nine genocidal routes and forty-six pacifist routes.
Frisk, wanting to mature a little and wanting to save the monsters after playing so much with the resets, decided to start a new pacifist route. At the beginning everything went as it should and there was nothing strange, but...
Why does Papyrus sometimes look at him with terror?! Why do they all have scars on their bodies?! Where are the human souls and where did they go?!
Frisk was very confused and didn't know what to do, he tried to do a reset, and in the new route... nothing changed and everyone still had scars.
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Wrong Warp by Hideyoshi Faz (FreddyFazbutt)
Fandoms: Deltarune (Video Game), Undertale (Video Game)
24 Jun 2025
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Summary
A fic in which Frisk dies in undertale and is reincarnated as Ralsei's little sibling in the closet dark world. How will the prophecy be affected by the addition of Frisk?
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The Console: Replay! by TheBriefcase001
Fandoms: The Amazing World of Gumball, Biohazard | Resident Evil (Gameverse), Persona 5, Persona Series, Crash Bandicoot (Video Games), Pocket Monsters | Pokemon (Main Video Game Series), Undertale (Video Game), Wario Land (Video Games), Minecraft (Video Game), Overwatch (Video Game)
24 Jun 2025
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Summary
Gumball finds his old cursed video game console that trapped Elmore inside a fantasy RPG game. When he accidentally turns it on again, he, Darwin and Anais find themselves trapped once more — but this time, the console transports them into the worlds of various video games.
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Summary
EBOTT CITY, 191X
Three years have passed since the two districts of humans and monsters reunited, leaving their differences, which once resulted in a civil war, behind in order to strive for a brighter future together.
In the area of Roadin, you can find a little stationery shop called "Doodlesphere", owned by a certain skeleton monster: a carefree, cheerful artist and storyteller named Ink. Despite leading a relatively unexciting life up until now, his natural ability to run into trouble causes him to bump into Error one day, the so-called "Destroyer of Progress".
Because Ink is always having dreams about other universes with Error being his archenemy, the artist decides to follow said businessman out of curiosity, only to realize that he and other "outcodes" are experiencing similar dreams that seem to be connected with one another.
So now what? Ink working together with the short-tempered Destroyer to solve this mystery sounds like a dangerous idea, right? Especially if you consider Error's relation to Nightmare's gang, the infamous mafia group which is causing restlessness in Ebott City right now...Series
- Part 1 of ÆTHERVERSE (Steampunk UTMV)
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Seven is the Number of Perfection by DodrioTheThird
Fandoms: Undertale (Video Game), Deltarune (Video Game)
24 Jun 2025
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Summary
A REWRITE OF "Six is the Number of Sin"
A single golden ray shone on the drooped figure of a single yellow flower. Six petals, six represents imperfection, six is the number of weaknesses and sins. Though there's 7 sins, one could say the last of them was Flowey himself. The number seven meant perfection, he was only one petal away from "perfection". One soul away that time.
Frisk visits Flowey in the underground and takes him to the surface much to Flowey's dismay. So much has changed on the surface, monsters have slowly been reintegrated into society. Adjusting would be difficult for Flowey, to say the least. Not like he has a choice. Yet Frisk and Toriel refuse to let him wilt.
Series
- Part 2 of Cornflower - Undertale AU
- Language:
- English
- Words:
- 3,731
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 16
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Life On the Surface by RetroWrites
Fandoms: Undertale (Video Game), Deltarune (Video Game)
24 Jun 2025
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Summary
Frisk has freed the monsters.
Now all they need to do is to live on the surface.
Campy story with plot and sad stuff on top of regular Undertale shenanigans.
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Parental Union by DemonicPrince23
Fandoms: The Owl House (Cartoon), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Murder Drones (Web Series), Phineas and Ferb, Undertale (Video Game), Deltarune (Video Game), Five Nights at Freddy's, Harry Potter - J. K. Rowling, Bendy and the Ink Machine, Star Wars - All Media Types, Undertale Yellow (Video Game), & More - Fandom
24 Jun 2025
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Summary
To my sister, assuming she finds this: PLEASE DON'T KILL ME! I saw the ship listed in the list of ships and was intrigued. I'm sorry.
To anyone confused: She and I know what I'm talking about. If she doesn't... Well, I'll survive for sure, unless I do something dumb and show her it. If she does... Well, I'll need to pray.
Credit for the idea goes to a Discord friend of mine, Voltage, who isn't a fanfic writer, but came up with the idea.
Credit for each individual fandom goes to their creators. I am none of them.
Credit for the story itself, however, is mine.
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Summary
(y/n) is your average; "ima do my own thing while the world burns " type of person... or is she ?
enjoy as she deals with the struggles living with people who cant make their minds about their opinions of her !
who knows it might get good(?)
(ill probably write a better summery later on)
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Crash out tale (a joke au) by im4gi_nati0n_fact0ry, Ufpapyruscafe, Wimidicus
Fandoms: Undertale (Video Game)
24 Jun 2025
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Summary
What if someone turned out to have more determination then frisk?
Frisk, after killing again, and again, lost determination, losing resets. Sans took advantage of that and killed frisk, but frisk managed to reset before dying, but then...why did 2 need humans fall down?
Series
- Part 1 of Every universe there's us
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This work exists to host entries relating to my project Undersided! These may be continually updated without posting new chapters, as more material is added. I'll add timestamps for each edit to a given chapter.
This work is dedicated to the public domain.
Read Undersided on the website at https://vector-graphics.github.io/undersided/ -
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Love. An emotion that carries a lot of weight and impact behind it. An emotion that can create beautiful memories and destroy the happiness of others. An emotion that can be tool to create and a weapon to destroy. But what happens when one human and three monsters get involved with such a powerful emotion. Following a big mistake in the Dark World, the four are about to get a damn good idea of what love can do to an individual.
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All is well, but I'm getting tired of treading water by crowbard
Fandoms: Undertale (Video Game)
23 Jun 2025
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All is well. Her people are safe. Her friends are safe. She is safe. Her child is safe.
So why can she not make herself feel that any of that is true?---
A little bit of a Toriel character study, do be warned that she has a bit of a panic attack at the beginning.
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Summary
(I'm not good at summaries LMAO, please help me)
Monsters have been released from the Underground and flood into Ebott City. As it turns out, this might not be so bad. Thanks to the monsters, you have a stable job at Grillby's. You've even gained a few crushes on some regulars!... I mean... who said that?
But relationships with these cute skeletons might be put to the test. When the stress gets too heavy, you tend to go completely silent... Will they still love you when they find out about your silent meltdowns? -
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What can you do when an immortal mage appears in the Underground after countless resets? You help her in her search for a happy ending.
And I promise you, everyone will have a happy ending, even against their will.
Series
- Part 2 of For the departed
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Swift and soft like a suckerpunch by MilesHasGoodMannersAndThatsWhatMatters for Creeky_Cricker, TheLibrarbrian
Fandoms: Undertale (Video Game)
23 Jun 2025
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Summary
You are what they call a 'Big Tiddy Goth GF', or whatever that means. You're tattooed and pierced and curvy. Wearing dark clothes and black lipstick like armor. Working as an editor for a smut novelist, you're happy and thriving.
You enjoy having your boyfriend Landon by your side. He isn't perfect, but no one is! He treats you well enough.At least you think he does.
Until, you meet Sans Serif at a pool party and you can't help but doubt how good of a man Landon is...
Are you REALLY happy?To top it off, you're starting to get sick in the mornings...
probably just a stomach bug, right?? -
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In which Clover falls underground more times than anyone really wants to count.
They only have to die one time, and the universe - and someone else - seems to be trying as hard as possible to make that happen.
...
Why are they so damn good at living?!(au premise - frisk and clover fall at swapped times. unfortunately for everyone, frisk lives.)
Series
- Part 1 of Fallswitch
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(reposted and some rewrite n)
After the Rako Hardeen, obi-wan thought that thing could go back to normal. But everyone he knew or loved shunned him away. The force couldn't bear seeing it spark be destroyed by those who didn't deserve him. So it sang a song.