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The House of Undertale AUs

Reads 5,781
Votes 150
Parts 31
Time 3h 4m

Reads 5,781
Votes 150
Parts 31
Time 3h 4m

This fanfic will have SansxReader, CharaxFrisk, and SansxFrisk. There will also be those original love, like AlphysxUndyne. You ask how Sans would like Frisk while liking you? Well, just look at the title. I never said that there would be only ONE Sans...

Welcome to The House of Undertale AUs. Let the battle beginAll Rights Reserved

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31 parts

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Underswap love [complete] by Author-Dayo

this is a love story between swap sans and the reader, the reader falls runs threw MT.Ebott trying to escape her twisted guardians when she is shot into a massive hole. Lost and hurt in an unknown place she is saved by a kind man who takes her in and treats her like family. Obtaining powers and learning about herself in the underground she uses them for good and helps get everyone out. Determined to help the people she Loves and holding onto her Hope she fights to survive and free everyone. this is my 1st Undertale fanfic and I wanted to start with underswap~ (if I get some things mixed up I'm sorry)

Forgotten Phoenix (New Purpose Sequel) by OreoDaSkeleton

It's been a few years since Y/N started her family. Without Honey, she made due with what she had; that being the cafe, her brother-in-law Blue, and her two twin sons. Of course she missed Papyrus. There was no doubt about that. Though, she had to learn to accept his passing. Her sons did not... One of her sons soon makes a secret deal, causing the whole world to reset back in time. The family of three wakes up in the underground. Two family members are now in dire need of medicine. They resolve to find help, get medicine, and find a way out. That is, until a familiar face steps back into their life. AAAAA- HI! It's Oreo aka Writer~San! This is a SEQUEL to one of my books! SECOND! If you haven't checked the first (New Purpose), THEN yoU nEeD to STaRt thErE! XD Also, Undertale and its characters don't belong to me, and is rightfully owned by Toby Fox. All Underswap characters rightfully belong to their owner as well. The writing in this book, though, is completely mine! Please enjoy (owo)~🖤

New Purpose (US!Papyrus x Female!Reader) by OreoDaSkeleton

Y/N, meets a new coworker that changes her life forever. A monster, doing his best to make a living after moving out of the underground. Sans is this ecstatic, cheerful, absolutely innocent skeleton, smiling despite any given situation. However, Y/N finds out that Blue's wearing a different attitude outside of work. He's exhausted and working himself to the bone, using all he earns to pay for countless medical treatments and bills. He claims that they aren't for him, but keeps silent and won't give more details. Who's bills is Sans paying for and could Y/N find a way to help? **WARNING- Small Depressive episodes will be presented in this book. Read at your own consent.** Hello! It's Writer~San! None of the art/undertale au is mine, but the writing 100% is! Enjoy!!!

𝐒𝐓𝐑𝐈𝐍𝐆𝐒 𝐀𝐓𝐓𝐀𝐂𝐇𝐄𝐃 ␈ ˢᵃⁿˢᵉˢ ˣ ʳᵉᵃᵈᵉʳ by luiexette

‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ١٥٧٤‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ♡ ❝(Name) is something... unpredictable, an enigma, perhaps. but that just adds to her charm.❞ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ١٥٧٤‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ♡ ‎❝I just want to have some fun. And well, peace, when all of this is over.❞ Entering a double life was something (Name) never loved. Assassin by night and regular civilian by day, she spoils her happiness with whatever she can to stop regretting the guilt of those who have died in her hands. But that was her personal choice, and honestly? She loves the thrill of the kill, relishing in the life she viewed as "fun" and worthy. ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ١٥٧٤‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ♡ Spotify Playlist "How Can You Say That This Is Love?": https://open.spotify.com/playlist/5RU5uqrDGb9JwD9h3nzW5e ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ١٥٧٤‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ♡ ⚠️ MATURE CONTENT AHEAD, YOU HAVE BEEN WARNED. READ AND PROCEED WITH CAUTION. THIS IS AN EXPERIMENTAL AND REALITY-BASED BOOK! ⚠️ Main Love Interest: Killer, Nightmare, & Classic Sub Love Interest: Fell, Dust, Ink, Dance, Dream, Navy (OuterTale!S), & Rust (UnderSwap!P) art belongs to

My love for a killer robot (MettatonXReader) by whtdouwnt

An Undertale fanfic based on Mettaton and Reader There is bloodshed, lots of it baby!!!!!!

(ՏᗩᑎՏ ᗩᑌ x READER x ᑭᗩᑭYᖇᑌՏ ᗩᑌ) A Skele-ton Of Harem by YourdailyMOONBERRY

You are a introvert who loves undertale and multiverse and loves to play video games and listin to music. What will happen if one day you meet the skele-bros of different au's and how will you help them go back to their world

UNDERVERSE by isimpforanimeboys1

!THIS BOOK WILL NOT BE UPDATED!FOR FULL STORY, CHECK OUT JAKEI ON YOUTUBE AND PATREON! The story takes place in a post-Pacifist timeline in the original universe of Undertale, where half of Sans' soul is stolen by a corrupted alternate version of himself known as Cross, who has his Chara inside his body. With the help of Ink -the guardian of the AUs- Sans will travel through the Alternate Universes to recover his soul while he discovers the origin of Cross and the imminent danger that will put the Multiverse at risk: The Overwrite button. Undertale - Toby Fox XTale - Jakei Inktale/Ink - Comyet/Myebi Error - Crayon Queen Fresh - Crayon Queen Aftertale/Geno - Crayon Queen Dreamtale/Dream/Nightmare - Joku Underfell - AU Community (The creator wishes to remain anonymous) Underswap - AU Community (The creator wishes to remain anonymous) Outertale - 2mi127 Core! Frisk - Dokudoki Undernovela - Pig-Demon Killer! Sans - Rahafwabas Fatal! Error - Xedramon Mild Swear and Violence Warning. Hope yall enjoy my suffering :D (Original story by Jakei - Transcribed by isimpforanimeboys1) Hey! You've reached the bottom. Quick note, the editing in this is quite bad. I wrote this in 6th grade, and I'm not very proud of it. There are multiple mistakes, such as me calling Underswap!Chara Frisk, and referring to X!Chara as they/them. PLEASE DON'T PAY ATTENTION TO THESE MISTAKES. THANKS FOR READING THIS.

€Top Star Sanses, Bottom Bad Sanses€ by HighCherryloljune

Welcome to this story! ⚠️NO REQUESTS⚠️ But otherwise enjoy:)

Book 2: The First Fallen Human by carelesscreativity

(DISCLAIMER: THIS IS AN UNDERTALE AU) Allow me to describe this in the simplest way I can. There is a fanfic-like covering, but with a much darker, twisted undertone. Sanscest, if that's what you're for, but also a juicy amount of story with it. Enjoy!

Pull My Strings Instead by CyberOrchid

Fanfiction, omg I can't believe myself xD Ink Sans X Error Sans X Underswap Sans Um basically ink vs Swappy for error's love..? Fuck if I know, I just think it's a good idea XD

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Slide 1 of 10

Underswap love [complete] cover

Forgotten Phoenix (New Purpose Sequel) cover

New Purpose (US!Papyrus x Female!Reader) cover

𝐒𝐓𝐑𝐈𝐍𝐆𝐒 𝐀𝐓𝐓𝐀𝐂𝐇𝐄𝐃 ␈ ˢᵃⁿˢᵉˢ ˣ ʳᵉᵃᵈᵉʳ cover

My love for a killer robot (MettatonXReader) cover

(ՏᗩᑎՏ ᗩᑌ x READER x ᑭᗩᑭYᖇᑌՏ ᗩᑌ) A Skele-ton Of Harem cover

UNDERVERSE cover

€Top Star Sanses, Bottom Bad Sanses€ cover

Book 2: The First Fallen Human cover

Pull My Strings Instead cover

Underswap love [complete]

this is a love story between swap sans and the reader, the reader falls runs threw MT.Ebott trying to escape her twisted guardians when she is shot into a massive hole. Lost and hurt in an unknown place she is saved by a kind man who takes her in and treats her like family. Obtaining powers and learning about herself in the underground she uses them for good and helps get everyone out. Determined to help the people she Loves and holding onto her Hope she fights to survive and free everyone. this is my 1st Undertale fanfic and I wanted to start with underswap~ (if I get some things mixed up I'm sorry)