Undertaleau Stories

1.2K Stories

An Error's Doll by EroseWisp
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...
I'm...swap gaster? by KarmaAkabane425
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...
Found Family - Sans!Reader x Nightmare Gang by DeadEnDead
Found Family - Sans!Reader x Night...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...
Becoming the multiverse from undertale by KarmaAkabane425
Becoming the multiverse from under...by Karma Akabane
What if someone from our world became the multiverse? Well everything is not likely to stay the same at all.. (Things will be different even possible personalities or a...
Immortality by DahRadSkeleDude
Immortalityby JJ_loves_Ruru
-VERY ANGSTY- Error gives up. there's no point in fighting anymore.. He gets captured but doesn't care. Ink and the council decides to send Error to prison for life but...
Sanscest Pics~ by OnlyAiko
Sanscest Pics~by Aiko but Stupid
Okay I'm only doing my Favourite ships so I won't be any taking requests. I stand my ground and would like it To stay that Way for as long as I stay on this App. ⚠️ALSO...
Undertale ideas for stories that hit me like a brick by A_Bored_Reader
Undertale ideas for stories that h...by NellB0_0
You want to write an Undertale fanfic and don't know what to write? Maybe even looking for a bit of inspiration to get you out of a writer's block? Welcome then. Since I...
I'm the most epic sans ever by KarmaAkabane425
I'm the most epic sans everby Karma Akabane
And someone from our world becomes epic sans, how will the rest handle epic now? Especially if they never even met epic before. (Everything is different, personalities c...
I'm Kris But In Undertale?! by Anime-lover109
I'm Kris But In Undertale?!by Tsubaki
Y/n was born in the real world but he had lacked adventure in his life. The only thing that had given him a sense of adventure was a few games like undertale and Deltaru...
A Shift of Events (StoryShift! Chara x Male! Reader) by Incurvat
A Shift of Events (StoryShift! Cha...by Incurvate
The story and some of the events taking in it is inspired by Red_Knife's book : Fallen Determination. One of the best fanfic I've ever read, check it out ! Y/N, a boy wh...
Transported as ink papyrus  by KarmaAkabane425
Transported as ink papyrus by Karma Akabane
Lol this came to be cause of a comment in my reincarnation as ink sans story. So I'm doing it. I don't know much about ink papyrus but meh, this is fan fiction so what h...
To the Bone by GhostFang12
To the Boneby GhostFang
It had been six months since Jaune Arc dissappered from the face of Remnant. It has been four years since Monster Kind had been freed from the Underground. On Remnant 7...
The Last One - Error!Izuku AU by Crosoxon
The Last One - Error!Izuku AUby Crosoxon
"There IS worse fate than death" The cover isn't mine. Just a few warnings: -boyxboy -girlxgirl(maybe?) -blood -su¡cide(kinda) -death
I'm now Napstablook from my undertale au!? by Daemos_Dizzy
I'm now Napstablook from my undert...by Daemos_Dizzy
Someone from our world gets transported to an undertale AU as Napstablook! Well it can't be that bad right? Minus possibly getting stuck in a FGOD or FGOC Multiverses? B...
Fading Ink  by FakerBuddHK
Fading Ink by FakerBuddHK
This is my take on Ink Sans by Comyet. Spoiler: It won't be always Sans. Read to find out more about this ;)
Bad Guys One-shots | Requests Open! by ThatStupidBean
Bad Guys One-shots | Requests Open!by B e a n
(First few chapters are pretty bad, thanks to me being a beginner writer when I started this) -Art DOESN'T belong to me, it belongs to the original artist(s)! -Welp! Thi...
UnderTale Oneshots (FINISHED) by TheGrinningKitten
UnderTale Oneshots (FINISHED)by TheGrinningKitten
Another Chance [Slow Updates ಥ_ಥ] by That_RandomBystander
Another Chance [Slow Updates ಥ_ಥ]by ARTHUR LISTEN OKAY
Dream makes a desperate attempt to finally end it all. He finally wants to end it for good. The guilt was too much for him. However, death rejects him and he gets subtly...
The Christmas Party [Undertale Au's x F!Reader] by _Sansational_Sans_
The Christmas Party [Undertale Au'...by Pᴜɴɴʏ Sᴀɴs
[Undertale Au's x F!Reader] Can be found in my Quotev Account --> @.FanboilingTrash | AO3 --> @.FanboilingWriter | Tumblr --> @.bdudette When Blueberry and Str...
Radical Reincarnation by mothmommy42
Radical Reincarnationby mothgirl
when you were walking down the street truck-kun decided it was your turn to be reincarnated Met a God who gave you three wishes strangely enough you choose to be reinca...