Undertalefanfiction Stories

As fragile as glass. The definition of one's soul despite the being stoic and cold. Even though you're the toughest monster alive, your heart is soft as a pillow. Sans...

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...

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 "...

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...

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...

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...

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...

You have lived in the underground for 4 months now, and had befriended the most adorable cinnamon roll ever, Sans. However, you couldn't help but to gain feelings for hi...

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...

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...

After the barrier had been broken and harmony between monsters and humans had returned, a new sinister force arises after peace returned to the land. When the darkness t...

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) has known the Star Sanses for a year or so now. But as of this moment, her and Ink are the only two who aren't in trouble. Blue has been kidnapped. Dream was turne...

[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...

UNDERTALE ZODIACS WOOOOHOOOOOOO This is definitely gonna turn out gr8 {Highest; 200 in Random}

This is my first book and I'll try to update on Fridays. Anyways, this story is about a girl who was a teen when she fell down the hole in Mt. Ebott and lived with Torie...

∆ You have stumbled across a book ∆ Welcome reader. Here you'll find ships of all types! you can request a scenario and a ship. All ships are welcomed here. Have fun and...

Suddenly you find yourself in the Underground, with no memories and an unknown and painful past. Your first encounter is Flowey and he tells you how weird and different...