Undertale Au's
91 stories
An Interesting Reincarnation (Reader reborn as...) by AliceParadoxi
An Interesting Reincarnation (Reader reborn as...)
AliceParadoxi
  • Reads 6,436
  • Votes 340
  • Parts 9
You wake up, finding yourself standing in a desolate grassy field, only the green grass had withered and died, leaving behind a dry, lifeless expanse. Above, the sky was a haunting shade of dark crimson, with a single crescent moon hanging in the air, its soft glow covered by the misty clouds. An overwhelming sense of pain consumed you...what happened here...? Let's rewind! You are Y/n, a human living on the surface, where monsters and the 'underground' don't and never existed. It was known as 'Undertale', a game made by game developer Toby Fox. You've played it before and loved it very much. The game became popular over time, and people started making alternate universes (au's) of the game such as Underswap, Underfell, Horrortale, Underverse, and many more. You had your favorites, mostly the more popular ones, and you knew the stories behind them. Little did you know that something unexpected would happen, changing your life forever. Cliché, I know :/ . .. ... .... This story has been inspired by some other reincarnation fanfics like "Misery Loves Company" by Fanfic_yes, "Reborn as Error" by Kiwi_Seal, and "Wait... I'm Nightmare!? I Thought I Died!?" by Donut2460. I encourage yall to check those ones out! They are great :DD | | | | (Cover art doesn't belong to me. I found it on Pinterest. I only edited it: https://www.pinterest.com/pin/10555380369605142/)
Transported as Ccino by Virus_bOi
Transported as Ccino
Virus_bOi
  • Reads 1,624
  • Votes 192
  • Parts 5
Here in the multiverse cafe,there is a skeleton. A skeleton who has captured the hearts of many. *suggestive themes but no lemon We like lemonade in this household
Repeated Reincarnation (REWRITE!) {SLOW UPDATES} by Galaxystar98500
Repeated Reincarnation (REWRITE!) {SLOW UPDATES}
Galaxystar98500
  • Reads 39,453
  • Votes 2,551
  • Parts 32
It was a bit...ironic, honestly. He (was he a 'he'? or was he a 'she'? he- she- they- didn't remember the life before all of this...) was just a regular person, as so he thinks, he didn't remember much of his actual past life. Just that he was human and..just normal. He didn't really expect to die and reincarnate, again and again and again and- Well, his reincarnation just repeated, over and over and over and over and over.... Well anyways, he found it a bit ironic. why? well, he'd never thought that reincarnation was a thing, and that he've been practically daydreaming about it in his past life. But he was envious. Just slightly, he didn't wanna be rude, besides, other people aren't experiencing what he's experiencing. If they don't know his problems, that's fine. That was fine, at least they didn't have to die so gruesomely or lonely everytime they die. And at least they didn't have to wake up, knowing that this was a new life and that the people around you didn't know you weren't yourself as a whole. That was fine, at least THEY didn't want to die one final time everyday. That was fine. Right...?
Reincarnated as.. Ink!Sans...? by KumoYuko
Reincarnated as.. Ink!Sans...?
KumoYuko
  • Reads 13,570
  • Votes 703
  • Parts 9
An Undertale Fan died. They met a God who turned out to be the one who'll transfer him into another world. He thought that it would be one of those stories but to his surprise he was reincarnated into an Undertale Multiverse.... AS INK!SANS?! with a twist.... FGOD.FGOC FGOD CONCEPT BY HARRISH6 FGOC CONCEPT BY FunnyDogeHaha Undertale by Toby Fox Empireverse by Lunnar-Chan Ink!Sans by Comyet Error!Sans by Crayon Queen Disclaimer: I own none of the characters in this story nor the concept. These Characters are the only ones I own. • Morse • Mercy [More will be added as the story goes on] TW: •Strong Language •Self-harm •Suicide •Uncomfortable things •Spelling errors •mostly more errors •Grammatical Errors •Cringe 20th Fgoc Multiverse 891st Fgod Multiverse No. 1 in Fgoc [01/21/2023] No. 40 in Fgod [01/21/2023] No. 1 in undertale [02/1/2023] No. 19 in Fgod [02/1/2023] (Updates when I'm motivated)
Reborn as Red by HyperFixtionSucks202
Reborn as Red
HyperFixtionSucks202
  • Reads 20,829
  • Votes 976
  • Parts 6
Somebody dies and is reborn as UnderFell Sans. They, aren't too happy about it. But now here they are, left with baby-bones Papyrus. Fuck! How do you raise a baby skeleton?
A Burst of SuperNova by Nanachi8
A Burst of SuperNova
Nanachi8
  • Reads 30,499
  • Votes 1,792
  • Parts 38
A change can lead to a new outcome, some worse than others or better than expected. When one's curiosity leads to a new life, do you accept the change or destroy it from happening? Well, welcome Error, the very destroyer of AU's to his new role in the infinite multiverse. Welcome him to Parenthood, strap in and have a seat as this will be a bumpy ride. And an eye-opener so to speak.
Lethal karma by sodacrepe
Lethal karma
sodacrepe
  • Reads 67,914
  • Votes 2,424
  • Parts 7
Fgod belongs to @harrish6 After Ink and the other sanses ambushed Error. He was driven to suicide and jumped into the void. Destiny and Karma went to Error's rescue. They had planned it for a long time. They argued over if Error should leave the multiverse as a whole. Or instead, upgrade Error a ton and have him come back and show them what for. In the end, they both decided to have him come back. Destiny wanted to see the look on her sister, Fate face. And Karma is just well- Karma. The cover isn't mine
Reincarnated as Error Sans by Lix_za
Reincarnated as Error Sans
Lix_za
  • Reads 83,651
  • Votes 3,586
  • Parts 21
Ok...but what if I told you that I died and reincarnated as my super favorite sans?? The Fgod Error sans. But the problem for me is not that, but that I love to flirt, in my old life I had a total of 0 friends but 5 lovers a day, I can't say something without flirting or looking maliciously. - WHAT IF I FLIRT WITH THE UNIVERSE CREATOR KNOWN AS INK SANS???? - screamed a looking like a 6 year old (to him) "...Does he know he has company?" Something spoke in a low voice "... I think.." A voice answered in the same way. Will our dear Error sans professional flirt manage to do his job without dating and betraying any of the sanses??. ----- *English is not my first language so if I have wrong grammar please correct me.
A Small Problem by Hidden-Ajinn
A Small Problem
Hidden-Ajinn
  • Reads 17,624
  • Votes 1,148
  • Parts 21
Ink thinks it's about time to warn the multiverse about the Dark Sans' - what could go wrong? --- An Undertale Sans is fiddling with his machine to escape his looping world after learning his isn't the only one out there - it malfunctions and sends him into a bitty AU - as a BITTY!? Coincidentally on the doorstep of an adoption center, in a box with OTHER bitties !? Whaaa ??? Luckily, he still has all his magical power. But will it be enough to get home...? And will he be stuck like this if he does? It doesn't matter. He needs to get home to Papyrus - regardless of his Small Problem. ... what was that about these fell bitties being unfit for resale? And why does Sans have a bad feeling about that back room...?
I am sans from cartoonfell?!!?!?? by Time_Dalek
I am sans from cartoonfell?!!?!??
Time_Dalek
  • Reads 4,693
  • Votes 145
  • Parts 7
You are sans from cartoonfell it is my aus and here we go. I do not own any other au!