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

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

DON'T STEAL MY AU if you want to use it give me credit

DIRECT SEQUEL TO "PATCHWORK SOUL" — A few months later. A family of monsters and their little human kid try to start life anew beyond the confines of a giant mountain. Maybe they find something. Maybe they lose something. Time flows ever onwards, but sometimes it goes sideways, and it's heavier than they thought.

Golden Quiche / Crimson Keeper specific universe. A 'Chronographer' is a title reserved for those with the power and authority to observe, manage, and record the annals of spacetime. They're the primary historians of this world.

"History books never tell the full story..." - Bete Noire

In a last ditch attempt to escape, Frisk, alongside her twin brother Harley, and their younger sister, run up MT Ebott and leap into the Underground. What they find from there is horrors untold, as the Twin's Tale unravels to become even darker than before. F!Frisk F!Chara M!OC F!OC. Genocide Route First, Original story after Pacifist, No Marty Sue, M for Violence

In a last ditch attempt to escape, Frisk, alongside her twin brother Harley, run up MT Ebott and leap into the Underground. What they find is not what they expect. Read as truths are revealed, enemies become friends, and the true threat to the Underground comes to light... F!Frisk F!Chara M!OC. Genocide Route First, Original story after Pacifist, No Marty Sue, M for Violence

Chara has fallen into the Underground and Gaster has found a way out of the Underground and expects The King and Queen to do what it takes to leave but he does not expect what The King and Queen will really do nor does he know The Human's arrival. Come and experience how Chara grows into their new home and how Gaster will try to ruin it. (Rated K plus for now may change to Teen.)

Looking for closure after finishing the game you write a letter to the characters. You never expected a reply.

Two essences in one body, it was never meant to last. Two weeks after monsters' freedom, the unlikely cohabitation between Frisk and Chara within one body starts breaking down. Frisk's body pays the price while both of their consciousnesses slowly start blending together. As they become a kind of human amalgamate, the two begin losing themselves more and more with each passing day.

This is my full AU on Killer Sans. Let me know if you want info of other Sans's or any other Undertale Character! Please note that this is MY AU not canon Killer Sans. My Killer DOES have some canon facts on him though!

And so it began. The SOUL that longed to rest on a bed of buttercups, under the sun Would do the last Fallen a favor, by ending their life as an offering To the ancient magic that locked Monsters on the Underground Charisk Tales - Part I of IV

"Third time is a charm", or so one would say. After their attempt at building Chara's SOUL, Frisk gave up life once more. Floating, guiding their own beloved in what should be a peaceful journey in the Underground. One last time, to SAVE them all. Charisk Tales - Part III out of IV

Ever wonder why the legend says, "Those who climb the mountain never return?" This is our tale, the tale of the mages.

Three times below the Surface. It took them three lives to honor their promise. A childish, innocent vow to the one they know and love, to friends, to a newfound family. They know they will be missed, but they cannot go back to the living world At least, not for now. Charisk Tales - Part IV (Final)

Undertale characters react to Man on the Internet's Musical. When something more sinister comes to their attention, what will they do? I do not own Undertale or Undertale the Musical.