Undertalefanfiction Stories

Undertale aus x reader Featuring (in order): Nightmare Error Dream Ink Cross Dust Killer Blue Horror The Soulmate Au is where everyone that comes or lives there will hav...

Y/N's been traded and sold her entire life. She's learned firsthand that if you don't obey your master, you get hurt. If you force yourself to listen, you live another d...

Y/N's best friend Blueberry (also known as Underswap Sans) invited them to move into the shared/connected apartment next door. They could hang out all the time! It's an...

DRAMA, ACTION, BLOODSHED... Love? After erasing hundreds and hundreds of timelines, Chara is suddenly stripped of her abilities. She's forced to lead an everyday life i...

FRANS This is a request and I have been really exited to start writing it! I really hope you like it! Echotale is not my AU! Neither is Jailtale! This is just my own lit...

Y/n L/n. A special human with a special SOUL. Yes, her Soul Trait is something new. But other than her SOUL trait she has another secret. One day, while she was at the...

The war between the two guardian rulers and their kingdoms lasted for countless generations. Then came the news that Nightmare went ahead and got himself some new "...

Gaster is the current royal scientist, set with a mission to break the barrier and free monster-kind from their underground prison. His loyalty and persistence to the ta...

[COMPLETED | Undertale x Reader] * There is another one of these collections of the famous game "Undertale" with the reader in it. * It fills you with determin...

This is the first fanfic I've ever written so plz don't judge. Reader-Chan is a female BTW but guys can read too. I hope u enjoy it! ^-^ COVER IS NOT MINE

One-shots about the superstar robot and you, the reader. There will be fluff (mostly), some steamy ones, and possibly more. I hope you enjoy reading these! #1 number in...

-FIRST BOOK OF THREE- Ever since the War, magic humans have been training to kill all monsters when they escape. They've even built a special school designed for teachin...

[2nd book] A Yandere Underfell Mettaton x reader story After Y/n falls down, they meet someone to help them throughout their way back home. Somehow they become very good...

status; ongoing‚ probably updates on wednesdays. » slowburn, action, romance, comedy. ✧ art belongs to @ProductionRoxy ✧ nightmare sans belongs to jokublog ✧ reader x va...

Cold. Everything was cold. And dark. I was so alone... how could I have wanted this? This couldn't possibly be better than before... the warmth, and the light, and the...

Happy endings don't always come easy. Monsters in the Underground know that better than most. Especially when it comes to humans: their history, their fate, and how they...

The Universe is vast. And if there is anything confusing that having two of yourself, it is having a vast plethora of others similar to yourself, that have the same name...

Classic x Au Sanses Classic after his whole Au has been corrupted, stumbles his clumsy ass into a portal into a friendly fellas places. How predictable. Anyways, the fel...

Flowerfell is an AU (alternate universe) of another AU called Underfell which is an AU from Undertale. If you don't know what Undertale is you will not understand any of...

Error Sans suddenly wakes up trapped in a place he likes to call 'The Void'. It's everything you would expect it to be. Barren. Empty. Isolated. He doesn't remember anyt...