Top 10 Best Teen-Rated Undertale Fanfics

by charamelwrites · Sans/Reader

You were kidnapped by the Bad Sanses gang because you apparently "stole" Horror's axe. All hell breaks loose. arc 1 (1-15): encounter arc 2 (16-?): after

by Asaila · Sans/Reader, Papyrus/Reader

You only wanted a normal life. Then you met them. Sanses and Papyruses from different worlds, each carrying their own past, their own wounds, and their own ways of becoming part of your life. For a while, it almost felt simple. Then the timeline broke. Now everything has started over. They don’t rem

by Tr41n1ng_Wh33ls · Sans/Toriel

Having been trapped for a few-too-many loops, Siffrin started to feel like nothing was going to change in their never ending play. How were they supposed to predict that the universe would put something so large to block their path to freedom? Literally? 'Something' the size of a mountain. Literally

by KittyCatPaw11 · Sans/Reader, Papyrus/Reader

There are a number of little ideas within my head—or strikes of inspiration from fellow Undertale creators—that I'd love to write about! But they need a home... Welcome to Reader x Everyone in the Multiverse! I don't have a schedule, but I try to post often! I hope you enjoy these stories :3c

by PlutoDeity · Alphys/Undyne

It all started with a housewarming party where only you showed up. Now, you're tangled up with multiple skeletons and a woman that hates your guts for no reason. As much as you want to act like you don't care, you really do, so what do you do now?It's not like you can survive on your own.

by 858FairyHats · Sans/Toriel

A few days ago, if Susie had saw Kris and Noelle floating on the lake, face-down, she would’ve thought that they were just pulling a harmless prank, or it was just Kris being an absolute weirdo. But now? As she stands in the cold of the night, pounding on Toriel’s door, a haunting thought snakes aro

by CommanderBullet · Alphys/Undyne

It's been a few years since Monsters returned to the Surface and lots of things have changed... Accompany your favorite characters from Undertale, Undertale Yellow and Deltarune as they try to manage their everyday responsibilities and go through a few wacky adventures while at it in this slice-of-l

by squeakydink · Mettaton/Papyrus

Mettaton. In the Underground, he's a household name! I mean, you'd have to be living under a rock to not know who he is. I mean, no other monsters have even dared to try being a celebrity. Everyone loves Mettaton (even Mettaton himself is his own fan). So why on earth is Mettaton laying on his bed a

by sillyandquiteawkward · Sans/Toriel

After accepting his fate to turn into a statue in the middle of the night, the night Kris finally visited TV World, Ramb suddenly and without any explanation, wakes up in the Light World the next morning, in a body he isn't used to, in a world he wasn't ever supposed to be a part of. It's his first

by theboywithburninghands · Sans/Toriel

After Kris’s suicide attempt, they realize that someone else close to them is in terrible danger. Or perhaps, is a danger to themselves…?