Ever wondered how Sans is so compliant to Papyrus' demands, well let's take a look to Sans' training, shall we? Underfell AU. Written for the prompt brainwashing for Bad Things Happen Bingo. Oneshot

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.

Twenty-one iterations of W.D. Gaster gambled on plucking a human from beyond their reality to stop a vicious cycle of genocide, and changed the multiverse forever. In a scrambled timeline, away from the grand tragedy of The Angel & The Anarchist, a young woman awakens on a bed of flowers in her pajamas...

(Being Continued) 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?

A kid falls down a vast chasm into the deep, and is set upon by countless monsters eager to murder whoever falls down and claim their souls. Somehow, this child is the villain in your story.

Before the start of this story, seven Humans, varying from children to teens, climbed Mt. Ebott for various reasons. No matter their reason, all seven fell into The Underground. What I can confirm for you now is this: The Eighth, despite a differing circumstance, has the same reason to climb the mountain as the first. Like the seven before him, he will fall into the Underground.

Human magic before the Barrier was achieved through the Cooperative Connection, a bond wherein a monster gifts his or her memories, and thus a part of their soul, to a human. Discovered when Queen Toriel gifted a blind prince a blanket which she weaved in her memories of describing the starry sky far above her castle in the Monster Capital.

Sans is kidnapped kidnapper...

It has been a month since Frisk has went missing... but for some reason, it feels as thought she has been gone for months. Her sister, Eve, decides to follow in her footsteps and discover something bigger.

Being a normal day like any other, Mettaton has ended up in a place and time he doesn't belong to, but even if he's alone, the star of both monsters and humans will shine and bring home no matter where he's at. Happy eight anniversary, Undertale.

Estando en medio de un día normal y corriente, Mettaton ha terminado en un lugar en el que no pertenece, pero incluso estando solo, si hay algo que caracteriza a la estrella favorita de humanos y monstruos es su capacidad para brillar e inspirar esperanza sin importar donde esté. Feliz octavo aniversario, Undertale.

At the end of the war, monsters don't have the choice : they have to join Mont Ebott for survive another day. Sans and Papyrus, forced to run away after the attack of their village, are delivered to the horror of the war without any help and this one objective. But as sons of the royal scientist, W.D Gaster, they are an easy target. Both of them start a dangerous journey.

The Riverperson is a very mysterious person in the Underground. Letting Frisk ride in their boat wherever they need it. They are always so carefree, but what if there is more underneath the surface.

"The ninety-fourth reset. That's when he started to unravel—or at least, that was when you started noticing." Despite reaching a "perfect" ending, you still reset in the hopes of saving Asriel . . . at the cost of losing Sans. When rewinding time is no longer a factor and events don't go as planned, can you find a way to save everyone? TW: depression, suicide, self-harm, language

A single choice has a huge impact. Not just on one person's life, but on everyone around them. In the Underground, there are many paths one can take. But when Frisk makes a choice that takes them off all the known paths, the world is changed forever, and Frisk becomes intrinsic to the fate of not just Monsters, but the whole world.

In this universe, the timeline is messed up, no one is nice anymore, and they hate humans. But...is the pacifist route really impossible in such a place? Come in if you want to find out

After the barrier is broken and all the Monsters are freed, Flowey finds himself alone in solitude once more. With no Frisk, no friends, no hope of returning to his former self, he languishes in despair. That is... until he meets a new friend. (In Progress) (Post-Pacifist / Warning: OC!)

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

everyone is free, everyone is saved. but what happens when a new soul/soul trait is created to replace frisk's old one, the soul of trust what will happen now?

This is an AI story about Undertale. Almost every text is generated by this, but some of them are modified by me, to make the story have more sense or better format. This may contain weird ships, I'm not sure.

Waking up in a basement surrounded by skeletons that you find extremely familiar is freaky especially when you know you shouldn't be there... ... why do you feel like you're in a fanfiction book right now? (trashy intro)

Parfois Frisk a juste besoin de se rassurer que le garde-manger sera toujours plein. Toriel comprend. (traduction de fanfic)

After Chara is freed from the Void, reunited with her friend, Gaster, and gone through a Reset of time, she must now help guide young Frisk through the Underground, showing her to get by without harming anyone. (Female Adult Chara, Female Frisk)

Chara est morte pour la deuxième fois avec Asriel dans le jardin. Mais ensuite elle se réveille à nouveau, pas dans le jardin, mais dans les Ruines, couchée sur une parcelle de fleurs. Mais où est Asriel? Et qui est la fille inconsciente à côté d'elle? (traduction de fanfic)