(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?

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...

Alternative Universe (AU) Story of an adult human male replacing Frisk and taking part in the events of the Original Story of Undertale. Plus he talks has his own personality and backstory. UT:RD Playlist in Profile Bio. Undertale belongs to Toby Fox

Long ago, Gaster fell into his own creation and his essence was shattered through space and time, forgotten by the universe. Some time later... he came back. A standalone prequel story to the longfic The Royal Hunt. Can be read solo.

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.)

bye bye frisk. someone new, yet familiar, is here. reality gives up, and flowy has slunk to shadows. the river person helps a stranger, and the skeleton shattered through time finds a very old friend. if this new human proves stronger than their predecessor, then maybe, just maybe, sans will see his father again. maybe, everyone will see the sun. but who knows. maybe not...

Sequel to To SAVE a Demon (Slow updates)

human from real world find himself in the underground 8 months before frisk fall. there will be other aus sans will appear.

Everyone knows the story, the story of how Frisk fell into the underground, made many friends, and eventually set the monsters free. But what if that wasn't the end of the story? What if there were someone who simply couldn't move on after the monsters were freed? Someone who's tired of being alone in the dark. Can Frisk avoid the consequences once again? Or is it already too late?

There are monsters in the forest. Now trapped within the endless woods surrounded by mask-wearing individuals, it is up to Frisk to discover the truth of the forest and to find the lost past of her mask companion all while hiding what she is from those who would seek to wear the skin of her face as their own.

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.

When Sans is kidnapped and taken to another world the others need to try to rescue him. However they are not the only ones looking to find this world as they find unexpected help in this rescue. This world is rather different from what any of them are used to and has it's own secrets to be uncovered as not everything is as it seems at first. Rated M for safety for darker themes.

"Long ago, two races ruled over Earth: Humans and Monsters." One race feared for their strong souls, the other for their magic, and the mages caught between them feared for both. All silently knew that war would be inevitable. The only thing that mattered was surviving it. One crimson mage understands that well, and is determined to keep herself and those she cares for alive.

Red gets a call from Undyne with some unexpected news. He gets the day off, but it’s only to look after his sick brother. Fell has come down with something serious, and he isn’t too receptive to Reds help. How is Red going to do this without getting dusted for his efforts? (Underfell AU)

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.

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.

Como científico real, Gaster debe ver siempre por el funcionamiento de todo pero eso ha llegado a costarle mucho más de lo que imagina, y por eso mismo el rey debe encargarse de él, pero ¿hasta que punto? ¿Cruzarán la linea más allá de la amistad?

"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.

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.

Bella had a hard life. Her mother died when she was 4, her "uncle" disappeared when she was 12, and her "cousins" were long gone. One day, her uncle's ex-assistant tells her to look through her uncle's research about the town's most cursed site, Mt. Ebbot. As she reads, forgotten memories return: fish with spears, goats with pie, flowers that talked... What was under Mt. Ebbott?

After a serial killer obliterated a good portion of the Underground, Sans, the considered weakest monster stood against it as a last stand. After pulling of a cheap trick, he just expected to the human to come back and try again but... that didn't happen. My take on what would happen after the 'get dunked on' moment if the human didn't reset.

I flinched when I felt the rocks move from under us, no longer able to hold our weight. I latched onto my sister just as the earth shattered beneath us and gave way to a free fall. Frisk screamed and I struggled to hold her to me. To use my body as a cushion when we made it to the bottom. One way or another, I wouldn't let her die.

Sans woke up in a forest in a far away land, or you could say he woke up in another world, was he isekai'ed? Yeah. 2 times in fact. Will he enjoy his new life? You can find out more if you read it. Also, I promise you that I won't be dead for. If I get some sort of feedback, then it will motivate me further into continuing this series. no feedback no continue. Rated M for safety!

What if you didn't destroy the reset button, but rather the menu? How does the world work when you cease to exist? What story will it piece together then? Hateful Glitch explores that question with a new set of characters and enemies alongside some well know past characters who are...A little different. Second Story.

An Undertale AU, where the Multiverse have created a creature that goes against nature.