¿Alguna vez pensaste qué sería de este mundo si las leyendas resultaran ser ciertas? ¿Si las historias transmitidas de generación en generación sobre criaturas desconocidas fueran reales y no simples relatos ficticios? Sin duda, a cualquiera le daría intriga indagar en la veracidad de este asunto. Más aun si vives cerca de uno de los lugares más famosos del mundo.

RESETING after another True Pacifist run through the Underground, Frisk puts themselves into a situation they found too difficult to finish. After meeting with Sans, Frisk decides to RESET one more time and regain their happy ending. But they find themselves unable to continue; instead, they stay behind to SPARE the Monsters they called friends the burden of knowing them.

The power of Determination is a strength that humans have in spades. It's what let you journey through the Underground, it's what kept you going in spite of it all. It's what drove you to try and SAVE Asriel... by any and all means. But what happens when that Determination falters? What happens when Determination rots under the weight of what you've done?

[Horrortale AU] After their fight against Omega Flowey, Frisk left the Underground to get help and save their friends. Unfortunately, humans are not as comprehensive as monterkind and they didn't believe them. How to change their mind ? In the Underground, the situation is getting worse. Toriel and Undyne are fighting for the throne, and chaos is taking place in the Kingdom.

Asriel is miraculously revived and is living happily with Frisk, Toriel, Asgore, and the other monsters. But Frisk has a secret, and Chara is tormenting them for it. 3 years later, they go back to Ebott and help Chara regain their compassion after having an empty soul for so long. A year after, Frisk is still the tiniest bit resentful towards Chara cuz..y'know. Fem Frisk Male Chara

In the wake of the human's devastation, Papyrus was made king, and his brother Sans was made to suffer the consequences of his own inaction. Papyrus has a lot to live up to, and as time goes on he is forced to face the past and make a grave decision for his people's future. (Speculative story about the King Papyrus neutral ending).

Just because your father is "Renowned Scientist Dr. W.D. Gaster" doesn't mean everything in life goes according to plan. Corbel H. Gaster knows this entirely too well. If trying to balance school, friends, and a life-altering disease wasn't hard enough, Corbel must also face the pressure of living up to his father's legacy. AU story for "The CORE of the Matter" CONTAINS SPOILERS!

A Multiverse Phenomenon drags Nightmare to a place that should be unreachable. Yet it changes the course of this Multiverse irrevocably.

In a reality where existence is a jigsaw puzzle of shattered worlds, a certain doctor has survived the collapse of his own universe and now embarks on a mission to build something new. Join one W.D Gaster utilizing the Observer, a creation of his own design, and navigate a realm where perfection is a mirage and every piece of a broken world holds the key to a bold new beginning.

Deltarune, but with Muffet. It's very short because I want to go to bed. Also it wouldn't let me pick Deltarune as a category. Sorry.

Gaster lost count of the days since he first entered the Void, but since that day, he had watched and analyzed each and every timeline there was. Just a few more resets, he calculated, and the timelines would start to mix. Worse, they would start to destroy each other. He had to make things right, stop the resets, and to do that, he had to leave the Void. UPDATE 2024: NEW EPILOGUE!

This takes place after the genocide run, where Chara will be fighting with Frisk. Also Chara and Frisk are both girls in my AU and As the future awaits, what choice will Frisk takes? RESET? SAVE? will they fall in the same situation again? or maybe things will be different this time. . . (also the cover is made by me!)

THE END AND BEGINNING ARE ONE POINT IN DARKNESS. It Was The End. It was The Beginning. Every World is collapsing, and one is the Support. Holding every timeline, every consequence, UNDERTALE's World is in for a rude awakening. The Three Heroes set out to find the root cause of this mess, with one clue, "Banish the ANGEL'S HEAVEN." But in the end... Do their Choices Really Matter?

In a scrambled timeline, Frisk has carved a dusty trail through the underground countless times, and a scattered scientist has had enough. He gambles on pulling a human from beyond his reality to try and finally stop Frisk. He's hedged his bets on...this sleepy-lookin' girl lugging around a bootleg sword to go fight a squinty kid in her pajamas. This timeline's doomed.

After the death of the sixth human, Toriel makes a desperate request: seal the entrance to the Underground. Sans reluctantly agrees, but stopping Frisk's arrival sends the system into chaos, and the soul of Determination finds a new host—Sans himself. Now burdened with immense power, a destruction-hungry phantom, and an unquenchable thirst for Determination, how will Sans navigate

Eran las primeras vacaciones que se tomaba. Sans pensó que serian relativamente tranquilas, claro, si se ignoraba los gritos de su hermano, Papyrus, y el enamoramiento de este con Frisk; la molesta y deportista Undyne, intentando que se levantase del sofá y moviese el esqueleto; además de la familia Dreemurr, conocia a Toriel, pero sus hijos eran otra cosa. [Chara x Sans] Resubido

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.

There are thousands of legends about the Underground, most of them telling the story of the human who managed to break through the barrier and free the monsters. On this occasion, it is time to go back in time, a story that is thought to be abandoned in the face of existence, one where we are presented with a new name, a new soul, a new identity, but the same righteous ideal. Is t

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 how to get through without harming anyone. (Female Adult Chara, Female Frisk)

Asriel didn't deserve this. To be back, to be nearly himself again, to be able to feel. But it was only because of the souls inside him. When he was about to release them, a voice made him question everything. The human children who died because of the fury he had caused wanted to live. He would right that wrong, no matter what. But bringing them back wasn't as simple as he thought

Littleverse: a multiverse in which most, if not all, of the main characters are children. Small children. Some of which have never had parents to guide them. FMD Ink: a psychopath. What will happen when these two forces meet? Well..a lot of adoption, fluff, and angst, apparently. We do not know how this happened. Go check out Clichély on AO3 and Wattpad!

A human who was once tainted with hatred and distaste for monsters has started to see the wrongness of her actions when she had gone to Aynor Village, the last monster town damned to be liquidated by human hands..

The power to reset the timeline, and the determination to move forward no matter what the cost. These are the two things that keep a young girl moving forward in the mysterious world of the underground. She could be the key to their salvation, but would it all be worth it? Especially if the one person that matters most remains trapped and alone. (I don't own Undertale.)

After getting to the surface countless times Frisk finally decided to tell Sans and Alphys what would inevitably happen, though that's when a desperate plan was suggested. If one soul isn't powerful enough to stop the resets, then maybe three will be. The only question is, how can those three souls meet, and will even that power be enough to stop the endless cycle of resets?

After Toriel mysteriously doesn't return from her vacation to the Spooky island resort one of her friends Undyne receives an invitation to the island and she takes the opportunity to find out what happened, but she finally finds Toriel, Undyne quickly realizes something is definitely wrong.