Undertaleaus Stories

1.5K Stories

Dark and Sweet by LuCkYcAt8D
Dark and Sweetby LuCkYcAt8D
Error is raped by Nightmare over and over until he is forced to seek protection from the only one who can protect him from the King of Darkness.
All That Remains by TheAngstQueen14
All That Remainsby TheAngstQueen14
A story of a young Ink discovering what it means to be a Protector of Creation, as he finds his place in the Multiverse.
Requiem for a Multiverse by TheAngstQueen14
Requiem for a Multiverseby TheAngstQueen14
"What does one do when faced with an end to a story?" An Ink tells his story to the creators as the Multiverse collapses around him.
Redefining Expectations-Insomnia Sequel by HappyWriter62
Redefining Expectations-Insomnia S...by HappyWriter62
This sequel to my Insomnia story, please read the first if you haven't already: Expectations and a Golden Stitch. The battle is over for now...has been for a bit now. T...
Undertale: Yan!Sans aus x White Lily Cookie!Reader by Yakechie
Undertale: Yan!Sans aus x White Li...by Herim Jike
They finally defeat Dark Enchantress cookie but at great cost... Many people died names Gingerbrave, Chili pepper, Rye, Carramel Arrow, Custard III, Wizard, Strawberry...
This life as Error Sans. by coolkidindahood
This life as Error Sans.by DaCoolest
⪼A life where our beloved [Reader/REDACTED] died a very.. 'Fun' death. ⪼upon realizing their death, they'd realize that they reincarnated into error sans, a character th...
'Bride' of Negativity by GlitchyBoi19
'Bride' of Negativityby Pom
After a bloodbath of murders and several aus being destroyed, Dream demands peace once and for all with his brother asking for 2 particular rejects, one being quite- str...
Becoming dream from dreamtale  by KarmaAkabane425
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...
Ink relocates error (kidnapped)  by KarmaAkabane425
Ink relocates error (kidnapped) by Karma Akabane
Yeah I gained an idea and stuff so things will be different even personalities and everything you can think of :)
Undertale AU oneshots by Whatamievendoingher5
Undertale AU oneshotsby Whatamievendoinghere
Disclaimer! None of the characters are mine, also a lot of stuff in this book are headcanons! Also it's a human AU for several reasons you can request anything, except l...
Reborn as Error by Kiwi_Seal
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...
To Kill A Killer by RosesHaveThorns16
To Kill A Killerby Rose Aurum
Nightmare's gang always knew that their job was risky, but they never expected to actually die. Then Killer was killed. Nightmare found a replacement quickly enough, bu...
SHIFTING JUST TO SEE  ¿? (Killer x Reader) by Lun4_Drawz
SHIFTING JUST TO SEE ¿? (Killer x...by Lun4_Moon!
A Killer x Female Reader. Your a 21 year old shifter, shifting into the UNDERVERSE, the Undertale AUS all in one universe. You just came back home from work at night, th...
Webs and Bones by KarmaSpidr
Webs and Bonesby KarmaSpidr
"Error, what did you do?" Ink didn't expect there to be AUs beyond the Doodle Sphere. Core Frisk never would have thought that there are things they can never...
Transported as lust sans...kinda? by KarmaAkabane425
Transported as lust sans...kinda?by Karma Akabane
What if..someone was transported as lust sans.. and also weren't them at the same time? (Different happening..different beginnings...etc