Undertalealternateuniverse Stories

With Nightmare coming to terms back to his original form he still struggles to fit in as the prince of darkness, however in the shadows many followers haven't approved o...

Nightmare and Killer are in-love mates, but some months ago Killer met Outer on a mission, and he ended up liking his company. Killer stopped loving his mate for how Nig...

ok so this story is just made for fun because again I'm bored at school rn. and this story will focused more on slice of life thingy. plus I will use human sanses and no...

This Is A Fan Fic For My Favorite Undertale AU Ship Honey Mustard! (US!Papy x UF!Sans) -Disclaimer- UnderSwap Papyrus and UnderFell Sans do not belong to me. UnderSwap P...

You'll find some Errorink stories and one-shots in here, you know how this goes. Have fun reading! [Beware some +13 and +18 chapters or one-shots!] I will update this u...

This AU combines the worlds of Undertale and Breadwinners. Not much more than that, maybe it will be more than that to some of you guys

In a world that was not meant to be created, one girl has the power to stop it from being destroyed. There's nothing special about this girl. There was nothing that qual...

This is the story of UNDERFILES. An alternate universe where files can be edited with the overwrite button. Humans committed mistakes that were impossible to solve, and...

So I just got hit with a random burst of inspiration and I'm writing my ideas here before I forget My Hero + Undertale multiverse Xover anyone? Oh, this is mostly crack...

These are the untold stories of Spec, an alternate version of Sans from Undertale by Toby Fox, created by Itorilan. You can find them on DeviantArt.

Hello there! I've written some fanfic and a manga, and if your looking for why I haven't been especially active then please read through this I've been working on drafts...

This is compiled of short or long stories Undertale themed! It'll be mostly oc and au work however so if that's not your thing I understand! May include: - LGBTQ - Heavy...

The journey never ends. Lylen, Frisk, and Asriel still has more adventures up ahead.

The creator no longer responded to the protector's calls, those colourful hues stopped dripping from the doodle-sphere. Without those hues, he couldn't feel anything. U...

The good, the bad, protection, and destruction. That's all it's ever been. Devastation and creation. It was an endless cycle. But what if there was more? When underlyin...

An Undertale AU about the core exploding. How fun. - - - What would happen if, say- the core exploded? Well, that's what absolutely, totally, and utterly, NO ONE was won...

hope you enjoy

Endless ideas streamed from their mind, unable to be written onto paper or typed onto the device. The battery of their headphones lowered and didn't help as the music he...

Another wacky Undertale AU I have! Hopefully less half-baked than the last one.