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.

"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.

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

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.

"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.

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.

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. :)

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.

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

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

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?

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

A household full of skeletons are competing over the attentions of one love. This isnt that house though. Unknown to the group secretively wrestling with their unpredictable love lives and universe-meddling machine, another house a few doors down has been gifted with its own skeleton posse clamoring for the attentions of their own little lady. A little old lady by the name of Mabel

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

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.)

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.