Undyne Histoires

One day, Sans found a game in his basement. What happens when he and some of his friends decided to play? What happens... when the npcs... are a little too... realistic...

Imagine a world where the player doesn't exist. And that is the exact representation of this AU. No genocide, no eighth human, no player. All the monsters including the...

I was just a 19 year old, living my mundane life, until I died... and was REINCARNATED!? And not only that, I was reborn in the famous videogame release in 2015 Undertal...

You have fallen in the underground. Find a way home.

Nobody knows who the Riverperson is... nobody but a single Skeleton erased from space and time. So when he's pulled out of the Void, what secrets will be told? What is t...

Join the crew on various adventures ranging from mundane lounging at home, unleashing the beast in Among Us, and ruining friendships in Monopoly to epic quests, journeys...

For 130+ years, monsters have been extinct with the only things left behind having been their hybrid children. Over the years as the hybrids continued to reproduce and 8...

y/n y/l/n is one of the people who has access to the magic in their SOUL. so she's working where everyone with magic that wants a legal job works, plus it pays real good...

Asgore had thought they were dead, the seemingly faceless and voiceless soldier that had been fighting with them years ago. Those years had passed by rather quickly, the...

Still working on title, this will contain vore, don't like, don't read

Alphys concocts a serum that was supposed to help Sans with his hp. Unfortunately the serum is tampered with by a certain fish who wants answers and instead the crew is...

It's been a six years since you and the Skeleton brothers moved into the Ruins, claiming one of the old houses in the city as your own. Astigma has another brother now...

Undertale will react to a lot of pictures, videos, comics, and more!

Have You Ever Wondered What It would be like if Ben 10 was in Undertale? Well look no further This is an adaptation of Undertale! The Main Characters are Ben And Frisk...

Amalia Roux, a 10 year old girl who had abbusive parents obssed with fame, she die brutally in her own father's hands while her mother watch just because Amelia win seco...

I decided to do an ask & dare with my AU, Staintale. Staintale is a AU where Frisk and Chara are controlled by the player, Chara, Frisk, Flowey, and Sans all remember re...

Clover doesn't give up his soul because justice still needs to be delivered. The Wild East, and later practically the entire Dunes, declares independence. They declare...

In the midst of Tokyo's bustling streets, you led a life that appeared ordinary, despite your role as a leader in a prominent gang. Yet, beneath the façade of normalcy...

This basically a concept Undertale AU idea I created, when every monsters have copycat abilities. _____ Copycattale belong to me (@i_like_fluffy1 aka HinnNotFound) Inspi...

You and your sibling, Frisk, have been living in a forest near the city for about four years now. Your daily routine has been unwavering since you moved here. Each day...