T/n es una tipa que cayó al Inframundo ahí conocerá a Mettaton y Napstablook lo cual se hizo muy buenos amigos pero empezaran a sentir algo por tí y tendrán rivalidad Liberaste a los monstruos. Esta historia no es original de juego. sólo es un fanfic. Los personajes no son de mi propiedad sino de Toby Fox

This is an AU where Sans is an overpowered God that posses such unknown powers and manages an alternate version of the Doodle Sphere known as the Recycle Verse

Error Sans the AU destroyer somehow wakes up in an genocide run of UT universe which somehow he decided to change the timeline for his own curious of what happens when the human lost their soul of DT but after having a long conversation with Papyrus Error somehow have this feeling of Hope and decided to make UT as his new home...

What happened to the other human souls? Why did they end up in the Underground anyways? (This is my interpretation. Not cannon. Cross posted on Wattpad & Ao3)

RESET Failure is part of my AU (Underfeelings) where a messed up genocide route happens and Chara appears before usual. Chara kills Frisk and RESETS, but something goes wrong. Chara realizes this when Sans is standing in the entrance of the ruins with his blue eye blazing. RESET Failure is rated T because of Self-Harming topics, gore, and language. This is my first Fanfic! Enjoy!

Kaister é um dos maiores gênios do universo, ele pensa na velocidade de táquions, mas ele é totalmente inútil, e imortal.

Long ago, war Broke out between humans and monsters. One day a human named Frisk saved them from beieng trapped underground. A year after this he saved chara and asriel. The kings son and his friend. After a long time, frisk and chara became friends. And one day they where married. But they had more friends then themselves. Frisk made friends in the underground and on the surface a

Classic is working on a project in the middle of a snowstorm. Edge takes care of him. [Kedgeup Fluff]

Switchtale Don fight and more. Please tell me what you want to see. I'll get around to it.

Frisk noticed that something is wrong. He is old. A lot older than he should be. He has only his family to help him through.

Dust, Horror and Insane doesn't wants to kill it was because of the despair that the human from the genocide run had caused on them but now after they've failed to stop the genocide run everything changed they got wiped into another timeline which is a pacifist route what will the murderers decided show mercy or keep continuing their goals of killing.

At 13 years old, Crow was a bit of a rough and tumble teen that had a mission. All 6 of his siblings had traveled to Mount Ebott and all of them had gone missing not long after. Taking his weapon in hand, Crow goes off to save his 3 sisters and 3 brothers. But not all is as it would seem in the area known as the Underground. T for cussing, violence, and stuff. Reviews are welcome.

While traveling in Hotland, Frisk meets Fuku, who is an orphan, and wants to help her find someone to adopt her. Will Frisk find the perfect monster to be a parent to Fuku? Done as a request for J-Farraday. :)

I've always wondered, what would Undertale be like if another human fell with Frisk? More importantly, what would it be like from their perspective? So I decided to write it. (Warnings: Frisk is female and has been aged up. An OC is the main protagonist. Sans and or Papyrus are not in every aching second of this. Also Rated T for language, violence, and certain scenes.)

"why are there two of you?" (Undertale AUs Aftertale and Reapertale, Sans/Sans AfterDeath, eventual poly)

I'm not very good at summaries sorry

Prequel to Undertale: Massive UNDERGROUNDS are being constructed as a war rages and threatens all life on the planet. W.D. Gaster doesn't know anything other than the war and the results. All he knows is how to help the refugees, how to make something out of nothing with difference sciences, and how to keep his brother's soul on the right path.

This is inspired by the comic ‘Sooner or Later, your gonna be mine’ So there will be some simulairtys, like the existance of the chacter ‘the Don’ and Gaster’s plan. Warning! mature content! Possible gore, slight (ok really) Yandere sans, mentions of depression/anxiety, mentions of sensual thingys, etc

After the Barrier fell man and newly freed Monster formed the Delta Ascendancy, a nation of science and progress. Together they built machines to cross the Hyper and make distant worlds their own. There among the stars they'd meet cultures older and far more advanced than they. Asriel Dreemurr wakes up in the Delta Ascendancy, perfectly regrown by their technology. Meeting Frisk

You want to survive another week, renovate your shack and get some respect. Then Sans started acting funny as soon as another human fell down… Is he slow blinking at you from the other side of the room? The hot topic skeletons are stressing you out! Sans is a violent idiot, Papyrus is a rule abiding ball of stress and you just want some toilet paper! Soft underfell. (Also at ao3)

Leap day (this was meant to be posted yesterday)

What if Frisk's soul took the brunt of their fall? What if somehow despite this, it persisted? What if...?

If you liked UNDERTALE: FILE NAME NOT FOUND, go down the branching path that leads to a far darker side of the Underground that you might find surprising. She tried to end her life in that cursed mountain. Now she tries putting that second chance to better use. But how? How does one find a life in a world where everyone wants yours to end for their freedom? Welcome to hell, human.

A Forgotten timeline. Gaster had chosen a new player to take on the Genocide but with only perseverance Hope's path leades to one that no one will remember. (Based on Xwolf26's doubletale. True start before Linkedtale)

How would things have gone differently if the six children that fell into the Underground before Frisk were taken care of by the monsters of the Underground? SPECIAL THANKS TO DREAM1990 FOR THE REQUEST!