Undertale Stories

1.2K Stories

Given An Unwanted Second Chance by UndertaleFanatic981
#1
Given An Unwanted Second Chanceby Purple
(TW: unaliving thoughts and memories at the beginning. It gets better over time, don't worry! Trauma is difficult to overcome...) You didn't want a second chance. You...
Castle's Pet (Bad Guys X Reader) by EmelinStriker
#2
Castle's Pet (Bad Guys X Reader)by Emelin
[Highest Rank: #1 in "sans"] [Second Highest Rank: #18 in "xreader"] (Girls only!) (Earlier updates are on my Quotev account!) WARNING: Profanity a...
Undertale meets Shield by Jaybird_Dragon2021
#3
Undertale meets Shieldby }Dunked_on_24/7{
After the barrier on the Underground, the monsters come out but to only be feared by humans. They decide that they will live on MT EBOT, away from the humans so that the...
Reborn As A Dust Sans [Undertale Multiverse] by DeadEnDead
#4
Reborn As A Dust Sans [Undertale M...by DeadEnDead
#1 of 61.7k tagged with Undertale 12/06/24 After drowning as a human, Ashe reawakens as a DustTale variant of Sans. With his ghost Papy helping keep him from falling int...
AU Sans X Reader One-shots by Little_Blue805
#5
AU Sans X Reader One-shotsby Blue
Completely female readers unless a request asks different. That's...really about it, enjoy!
An Error's Doll by EroseWisp
#6
An Error's Dollby EroseWisp
You didn't have a bucket list or anything, but you wished you could've at least read a few more fanfics or done literally anything fun before dying. Oh well, at least yo...
UnderHappened by FatalityWanes
#7
UnderHappenedby FatalityWanes
The Undertale Genocide Route is happening, but a new card has joined the deck: Finn, a quiet kid with a love for stuffed animals who falls into the Underground soon afte...
Completed
Reborn as Error by Kiwi_Seal
#8
Reborn as Errorby Kiwi_Seal
Cover image made by me. Someone meets their end too soon and meets someone who gives them another chance to live a more fulfilling life. One that they would enjoy despit...
Reincarnated as a Voice by IHamTiredAndBored
#9
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...
Reborn As Error's Mom by DancingAce1
#10
Reborn As Error's Momby DancingAce1
Well to start off, I'm just a teenager and I died in my sleep and was reborn as a skeleton, who is supposed to be error sans mom?...*stares at the cute bundle of cutenes...
Asriel Deku  by dogday2006
#11
Asriel Deku by gre0202006
Disclaimer: I don't own mha or Asriel they belong To their respective creators
Reborn as Dream Sans [Undertale Multiverse] by DeadEnDead
#12
Reborn as Dream Sans [Undertale Mu...by DeadEnDead
Reborn as the guardian of positivity, you find yourself in a strange new world, uncertain of what it may hold. Navigating it isn't easy with gods like Nightmare and Erro...
The Multiverse Tyrant by Lxzaruss
#13
The Multiverse Tyrantby lazar.
!! STORY COVER IS MINE, CHARACTERS DO NOT BELONG TO ME EXCEPT Y/N !! (ps, heavily inspired by my other books, mainly Multiverse's Unwilling Protector.) (Book is currentl...
PARACOSM ␈ ᵇᵃᵈ ˢᵃⁿˢᵉˢ ˣ ʰᵉᵃˡᵉʳ ʳᵉᵃᵈᵉʳ by yourwifeAn
#14
PARACOSM ␈ ᵇᵃᵈ ˢᵃⁿˢᵉˢ ˣ ʰᵉᵃˡᵉʳ ʳᵉᵃ...by darling …⁠ᘛ⁠⁐̤⁠ᕐ⁠ᐷ
"the healer likes t' sleep. like, a lot." Axe looks at the sole female AND human member of Nightmare's subordinates. She was only ever awake for about 8-10 hou...
Black Roses (Overprotective!Bad Guy Sans' x Child!Reader) by JulesRedenger
#15
Black Roses (Overprotective!Bad Gu...by JulesRedenger
Nightmare found a young child a long time ago. When they fell into a coma it sent him over the edge. several hundred years later the child wakes up in a castle of darkne...
Completed
Reborn As Lamia Killer Sans! by DancingAce1
#16
Reborn As Lamia Killer Sans!by DancingAce1
To sum it up, someone is reborn as lamia killer sans! If you want to know more, continue reading!
Lost Soul by CatOppp
#17
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...
Fresh New Antivirus by Hidden-Ajinn
#18
Fresh New Antivirusby Hidden Ajinn
Fresh is Admin of the Multiverse!? This can't end well ... or can it? This is an alternate universe - er, multiverse - where Fresh is responsible for the monitoring and...
Five Nights at Undertale by Awesome1o2
#19
Five Nights at Undertaleby Deactivated(Awesome1o2)
What would happen if instead of Frisk, the crying child from FNaF fell down Mount Ebbot? This is the story of Daniel, a poor, crybaby 7 year old and his weirdly sentient...
Desert Sanctuary Guidebook by KarmaSpidr
#20
Desert Sanctuary Guidebookby KarmaSpidr
Clover doesn't give up his soul because justice still needs to be delivered. The Wild East, and later practically the entire Dunes, declares independence. They declare...