Undertale Stories

1.2K Stories

reincarnated as wyvern (atomictale sans[my au]) by CAMStheCATASAUR
reincarnated as wyvern (atomictale...by Charli Sanders
what if someone from our world died and was reincarnated as atomic!sans/wyvern? please understand that the au of 'atomictale' was made by me and i dont mind if anyone us...
ClockTale an Undertale AU by fublle
ClockTale an Undertale AUby MOOOO(D)_I'M_TIMER_DA_OBNOXIO...
"Hm?" Timer asks taking his wrist watch off, checking the time before taking out a screwdriver and pulling it apart. Nervous habit of his. The meeting between...
Undertale meets Shield by Jaybird_Dragon2021
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...
UnderHappened by FatalityWanes
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...
God of Lost Stories by CatOppp
God of Lost Storiesby Cat
Alloy, the God of Balance, has been sent to a new Multiverse to try and heal the damaged caused by the Deity of the Fate. The Monsters he meets share the faces of his fr...
Undertale Characters React to Ships by TheReturnOfTurtle
Undertale Characters React to Shipsby TheReturnOfTurtle
Okay, so basically, I'm going to try to take any canon clues I can find to come up with their reactions to the ship. It will follow the same order as my own opinions if...
Bone of Contention (Underswap Papyrus X Reader) by TheIndianaCrew
Bone of Contention (Underswap Papy...by Indiana
Humanity is divided over one thing---the Monsters' reappearance. Some believe that they should stay aboveground, and others think that they should be sent back to where...
Sanscest lemons🍋[DISCONTINUED] by TheFunnysinner
Sanscest lemons🍋[DISCONTINUED]by TheFunnysinner
The title says it all people!Now i don't want any cinnamon rolls reading this,There too innocent!Anyways,enjoy! Ps:Most of this is not canon,so don't come at me for addi...
Fairytale Complex - [Sans x Reader] by james_trmtx
Fairytale Complex - [Sans x Reader]by 🌺 Jaime 🌺
[Frisk's Parent Reader | Slow Burn] The dichotomy between black and white is your constant when it's time for you to meet the whole new civilization Frisk brought along...
You and Your Bitty Pals by Blueprint15778
You and Your Bitty Palsby Blueprint15778
It has been 5 years since monster broke free from the barrier, since then monsters, and humans live together in peace. But for some reason monsters have some how go a mi...
C0deta1e an Undertale AU by EquanoxDragon
C0deta1e an Undertale AUby Equanox
This is the story of C0de Sans, and how he came to be. WARNING It is very possible that this story may take some dark turns in the future, and there will be use of stro...
Reborn as a Echo Flower? by DancingAce1
Reborn as a Echo Flower?by DancingAce1
Where am I!?And why the heck am I suddenly a blue talking echo Flower?
My Two Masters (UF!Papyrus x Skeleton!Reader) by OreoDaSkeleton
My Two Masters (UF!Papyrus x Skele...by ~Oreo / Oreyna~
Y/N's been traded and sold her entire life. She's learned firsthand that if you don't obey your master, you get hurt. If you force yourself to listen, you live another d...
The Bone Warrior (Sans x Female Warrior Skeleton) by Lunargal624
The Bone Warrior (Sans x Female Wa...by Lunargal624
Your name is (y/n) and you have lived on the surface as a royal guard for the science department in the monster areas. Your species is skeleton, there's still a good amo...
My Itty Bitties by ItsSwapPapyrus
My Itty Bittiesby Teutonic
A box has been left at your doorstep. thinking that someone must've given you the wrong mail, you take it inside and wait for someone to come by and claim it. When a wee...
Becoming Error, The Forced God Of Destruction  by PinkieKidoCup
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...
《♡My six saviours♡》 by FuCkInG_FaBuLoUs
《♡My six saviours♡》by TestingMyFuckingPatience😞
A child. You were a small, defensless human being who the world had no mercy on. Everyone knew you were damaged; broken beyond repair from a young age. They didn't think...
Just SING | Sans X Reader by artsyTrashpile
Just SING | Sans X Readerby -
--Long ago, two races ruled over Earth-- --HUMANS and MONSTERS-- --One day, war broke out between the two races-- --After a long battle, the Humans were victorious-- --T...
Six Skeletons, One Maid by RaccoonSinQueen
Six Skeletons, One Maidby RaccoonSinQueen
Moved from AO3 because of reasons! "You are the only maid (or worker in general) that serves for the Skeletal Household. It's a skele-ton of work, but you manage by...
𝐒𝐎𝐔𝐋𝐦𝐚𝐭𝐞𝐬 ;; Bad Sanses x Male Reader x Star Sanses by RipeWolvesBane
𝐒𝐎𝐔𝐋𝐦𝐚𝐭𝐞𝐬 ;; Bad Sanses x...by Bane
The multiverse. Yes. One full of millions and millions of copies of me. Heya, the names Y/n. Y/n the skeleton. Although I'm not the original, I am just a weirder copy of...