Undertaleaus Stories

1.2K Stories

Reincarnated as a Voice by IHamTiredAndBored
#1
Reincarnated as a Voiceby TiredAndBored
TW: Swearing and slight gore Y/N reincarnates in the anti-void as a Voice... Will he befriend error or will they make them hate their guts? And will they meet other peop...
Becoming Error, The Forced God Of Destruction by PinkieKidoCup
#2
Becoming Error, The Forced God Of...by PinkieKido Cup
What if someone is reborn as Error? What if they aren't so bad? What if they're suffering in silence and keeping their job a secret for fear of hate? How will Ink react...
Completed
I'm...swap gaster? by KarmaAkabane425
#3
I'm...swap gaster?by Karma Akabane
Yeah sorry gained an idea on if someone became swap Gaster Also they may be apathetic or just confused on their feelings and MAYBE Autistic, I may be a bit wrong on ap...
A Killer Life by FewCafe
#4
A Killer Lifeby nok_nok
adopted story. original by @Mijunaa :3 - The afterlife of a dead human that reincarnated into a Killer!Sans variant. The facade of the new owner of the body, could he k...
Becoming dream from dreamtale  by KarmaAkabane425
#5
Becoming dream from dreamtale by Karma Akabane
What if someone from our world became dream on the first day they were made and were determined to not lose their brother to corruption like the original dream did in th...
The Soulmate AU by -Horror_Sans-
#6
The Soulmate AUby Horror
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...
Naturetale : reborn as lavender  by KarmaAkabane425
#7
Naturetale : reborn as lavender by Karma Akabane
(As far as I know, no one has made a story about naturetale like this so..and the only reason why I writing one like this is because of fatal error part 5? Or part 4, go...
Reincarnated as Dream with Differences by Xalatea_Zennia
#8
Reincarnated as Dream with Differe...by Zennia
A 'random' teenager dies all of a sudden from what seems to be a gun, they aren't your usual teenager, it was someone more then that. Someone that nobody wanted to die...
"Not Quite Determined" Sans x Human/Monster Reader [COMPLETED] by FloweyTheGrouch
#9
"Not Quite Determined" Sans x Huma...by AsrielAs Flowey
You've lived your life without ever knowing your parents. Despite that you dream big because you don't have much; aiming to become a famous singer and prove anyone who h...
Jaune Error by CCKGISKMKGSRAD
#10
Jaune Errorby Core Jaune
Jaune Arc this man always wanted to be a hero like his ancestors but fate decided to mock the blond knight Jaune saved Cardin Winchester from the Ursa Major but Cardin d...
Lost Soul by CatOppp
#11
Lost Soulby Cat
Sans doesn't remember a time when he had his own name. He always wakes up as a Sans, but everything else is constantly changing. He is an observer meant to simply watch...
Completed
Killed it! {Reincarnated as Killer sans} by coolkidindahood
#12
Killed it! {Reincarnated as Killer...by DaCoolest
⪼Beaten up and betrayed, {Y/N} dies an unfair death because of their backstabbing best friend. ≫Realizing they have been reincarnated, {Y/N} searches for a new purpose i...
Simpmare  [Errormare] by DahRadSkeleDude
#13
Simpmare [Errormare]by JJ_loves_Ruru
Nightmare is a simp for Error thats all ya need to know.. love at first sight? slowly falls into simpness? Will Error like him back? maybe..idk..read to find out Also...
Reborn as a baby Xtale Gaster by Cosmicstars08
#14
Reborn as a baby Xtale Gasterby Cosmicstars08
This doesn't 100% follow the original Xtale story even before the babifacation of Gaster. When a pure yet genius soul dies at the same moment one of Xtale Gaster's over...
𖤐⏤͟͟͞͞A Guardians' Mother⏤͟͟͞͞☆ (Sans Au x Single!mother!reader)  by A_tired_artist
#15
𖤐⏤͟͟͞͞A Guardians' Mother⏤͟͟͞͞☆ (...by A_tired_artist
She didn't really expected this, just a few seconds ago she was protecting her kids and now she's staring at a bunch of skeletons and a human with two of them looking a...
My Villain [Dust Sans x Reader] by sighnerd
#16
My Villain [Dust Sans x Reader]by *=Dial-Up=*
A young woman, left alone after her family sadly passed in a car accident, suffers with PTSD and Anthropophobia (Fear of people.) Her only happiness in this world is the...
Completed
Reborn as Classic Sans but different (rewrite) by SarahWingDing
#17
Reborn as Classic Sans but differe...by Sarah WingDing
A 31 year old female died and reincarnated as Classic Sans. The multiverse is fighting.Will she join the fight does she know the truth?
Becoming Fresh sans by AmeliaForEli
#18
Becoming Fresh sansby LazyAmeliaforEli
What if someone in our world becomes fresh sans? --- Story Status: [✴️Ongoing] |⚪Unedited⚫| 。☆✼★━━━━━━━━━━━━★✼☆。 Impressive Ranking: #128 out of 47.9k - Undertale | ⊙.☉ ...
HIATUS | Found Family [Undertale / Nightmare Gang] by DeadEnDead
#19
HIATUS | Found Family [Undertale...by DeadEnDead
Cherry, an unusual swap-sans type, draws the attention of Dream and Nightmare when he is left the only survivor in his underground. With his Papy's gaster blasters follo...
Suffocating Joy {Nightmare x Reader} by Haru_Writes_0
#20
Suffocating Joy {Nightmare x Reade...by Haru
(Y/N) loved horror stories- true crime, creepy-pastas, urban legends. You name it, they liked it. When a walking nightmare (pun intended) showed itself to the young huma...