[Underfell AU] Undyne is weird, and Papyrus doesn't like it. But by the time he tries to understand why, Undyne gives him the lead of the Royal Guard and disappears from his life. But why? Papyrus investigates, as some people try to dissuade him too. Probably because all the tracks are leading to Asgore, and that if he doesn't give up, he might lose way more than his job.

A remake of my first fanfiction, Darknesstale, which was very rushed. I intend for this one to have at least twice the content. It takes place a year after the True Pacifist ending, and Gaster is returning to the world. Chaos ensues.

After sacrificing the souls to destroy the barrier and give everyone a happy ending, Asriel stayed behind in the Underground. He feared that, without a soul, he would hurt everyone as Flowey. But when a new human falls into the Underground he decides to help her out. And during their travels the duo have interesting encounters and discoveries in the now empty(?) Underground.

What would you rather see? A skeleton and a human talking about magic? A king thinking over his decision on if he should let humans live underground? A flower who's hellbent on killing everyone and everything? Or perhaps a young aspiring guard working their patrols diligently. The side stories of their lives, chosen by our readers, reside here. Sequel to Two Worlds, Two Souls.

They say that you die a hero, or live long enough to see yourself become a villain. In Seth's case, maybe he should have just died.

A collection of Underswap oneshots brought over and refurbished from my old wattpad account, plus possibly new ones! Enjoy the humour, angst, and whatever else comes to my strange mind! Frisk, Chara, and all other ambiguous NPCs will use They/Them pronouns, including Monster Kid and Mettablook.

(This is a remake of the original What if) Down into the dark, Chara fell. Down into the dark, an experiment was run. What if she got to go home? But what if it wasn't to the world as she knew it? What if she was placed into another, at another time? What if that happened to be a version of Underfell?

Frisk has Reset hundreds of times while searching for an ending that is just out of reach. When a run ends differently than any other, Frisk sees a chance to find the ending they truly desire and fulfill a promise they made long ago.

What if two humans were in the Underground at once? What if one human was DETERMINED to stop the other? What if they could both SAVE? What happens when an Unstoppable Force meets an Immovable Object? When a certain scientist pulls enough of himself together, he finally finds a way to stop the destruction of his world. (Undertale AU. Rewrite of DT.)

Malory Wares is a massive Undertale fan, to the point she asked for Toby's permission to make and program a fan project of the fabled Hard Mode of Undertale. But when she uploads it, she is suddenly transported to the Underground, but in real life and no 8-bit graphics! But when she learns she has a soul filled with intelligence and magic, she must use them to go back home. Rated T

This is a sequel to my old story, Integritale, which you will find in my profile. I don't know if this could be considered an AU to the Undertale Universe, since I did add a lot of stuff, but still tried to adhere to the canon as much as possible. In any case, please, enjoy! Any feedback is welcome!

A woman trying to escape a fate of death and ended up falling through a hole in Mount ebott.Wary and Anxious of her situation in the underground,She must find a way to survive and leave.But...why were these monsters so gentle and nice?friendly?and why the hell did she find herself being too attached to one punny skeletons with hundreds of different versions of himself?

Frisk promised to free monsters from the Underground but died at Asgore's hands. Several years later, the Underground brings another human to its magical depths, only this time, things are much different, and a misunderstood murdering of all of them leads to a RESET that merges two timelines together in a way that was never meant to be. AU/AT story.

Frisk falls in the underground at a time where Asriel and Chara are still alive and is first found in the ruins by the latter. Frisk being a human, Chara considers them as a threat to monsterkind, especially once they discover Frisk has the ability to go back in time and erase the consequences of their actions. Can Frisk show to Chara that not all humans are as bad as they think ?

Something happens to stop the normal flow of a Genocide run. An anomaly appears...but maybe it's not the one you think. *Trigger warnings: there might be some violence/threats/feeling trapped and self-harm at some point

Red fue separado de su hermano menor a los seis años y fue internado en un Centro de Control dedicado a la experimentación biológica donde muchas crías mueren durante las investigaciones. Sin embargo, al ser un esqueleto, su nivel mágico supera los estándares entre otras especies de monstruos y termina convirtiéndose en un arma letal a los once años. AU War

"El jugador" ha muerto... Y ahora todos quieren JUGAR. En la peligrosa Ebott City, radica una constante inconformidad por habitar monstruos y humanos en un mismo lugar., desatándose conflictos delictivos que atentan con la vida de los habitantes. Sin importarle las advertencias de su madre, Frisk decide ir a la ciudad y tener su florería junto con su compañero y mejor amigo Flowey

Everything is nice and perfect in all Universes. But when Error and his possy decide to steal some Frisks, that's when things get bad. Read along as we watch these skeletons fight and try to get their soulmates back.

"The little girl just could not sleep because her thoughts were way too deep, her mind had gone out for a stroll and fallen down the rabbit hole." - A life of fear is not what Frisk ever expected to have. - Warning: this is a dark AU that tackles mature themes and is not recommended for sensitive readers.

[Fanfiction Underfell] Papyrus est dérangé par le comportement d'Undyne depuis quelques temps. La guerrière arrive en retard à tous leurs rendez-vous, en plus d'esquiver le sujet à chaque fois qu'il cherche à comprendre. Et puis, un jour, elle lui laisse le contrôle intégral de la garde royale et sort de sa vie, sans aucune explication. Papyrus refuse de rester sans rien faire.

Born into a life of cruel subjugation and confinement, a young child discovers that a different kind of prison might just become her safe haven. But nothing is ever that simple. With a deadline looming and troubles starting to pile up, a new friend with a lazy grin could be just what she needs right now. Multiple AU's. Slow burn. Female Frisk. Contains OC's. Eventual SansxFrisk

Mettaton and Luna go to visit the skeleton brothers, but Luna is nervous about meeting her uncle Gaster's brothers. Can Sans and Papyrus show her that she doesn't have to be afraid of them? Done as a request for paradise dazzleshine. :)

EXPERIMENTO NÚMERO 1987 ALTERAÇÃO DA LINHA TEMPORAL X INFILTRAÇÃO NA LINHA TEMPORAL X EXPERIMENTO NÚMERO 2015 CRIAÇÃO DE FISSURA YES EXPERIMENTO NÚMERO 2018 EM ANDAMENTO OBJETIVO CORE

For Monsterkind, the Surface represented freedom. For Frisk, it's a return to some uncomfortable realities. It all began with a simple wish. When that wish faded, Frisk tried to move on. Except, 'moving on' was not so simple. Emerging from the Underground had put them in a worldwide spotlight. From an unknown child, they had become an icon of great value.

He wanted to SAVE her, so he gave up his SOUL. She never expected to be SAVEd, to be LOVEd, to be alive. Yet, there looms another calamity in the Underground One none expected to rise again from the battlefield. Charisk Tales - Part II of IV