Gastertale Stories

25 Stories

Undertale Meets Its Au's by ErlinaMaeErika
#1
Undertale Meets Its Au'sby ErlinaMaeErika
The title says it all! Hope you enjoy undertale belongs to Toby fox The Au's belongs to their respective owners and also the artist who made the fanart.
Accused of Murder - Gaster!Sans x Abused!Reader by AsuRose
#2
Accused of Murder - Gaster!Sans x...by Asuna Rose
18 year old girl, named (Y/n), is on the run, accused of murder. Whether or not she actually murdered them, that's her secret. She's on the run from the police, and goin...
Completed
Nightmare Harem (AU Sanses X Female Reader) [Discontinued] by LonelyFujoshi3984
#3
Nightmare Harem (AU Sanses X Femal...by FlilyOtaku
This is an AU Sanses X Female Reader fan-fic. Take note that some characters here might be out of character for the sake of the story. _________________________________...
Sans High ( Highschool Sanses X Reader ) by HayumiJuno
#4
Sans High ( Highschool Sanses X Re...by Hayumi Juno
i know the wallpaper is unrelated.. i need to search for the right wallpaper sorry! so basicly its about you prentending to be a boy at a school... since your guardian...
One-Shot Collection; Sans x Reader by AyePapy
#5
One-Shot Collection; Sans x Readerby P A P Í
//Requests are open// Different varieties of characters to read. From original Sans to AUs. The possibilities are endless! Lemon, perhaps... *you feel your sins crawlin...
Lost in the Echo ((GASTER!PAPYRUS X OC)) by chloeellings
#6
Lost in the Echo ((GASTER!PAPYRUS...by el
G was used to living a life of repeats, constantly going over the same game plays. The same friends. The same death. The same grief; so it was only natural for him to ta...
Status and things. by -Jaehee_Kang-
#7
Status and things.by Jaehee Kang
Just some status updates and other stuff.
G sans x Reader by KittyGamer2012
#8
G sans x Readerby Masky
This is my first story ever so sorry if it is bad ¯\_(ツ)_/.
Undertale AU drabbles/oneshots by Kouise
#9
Undertale AU drabbles/oneshotsby Glitchygirl
I cant think of anything else to write about so! Here's my shitty writing!
Gasterly Squichy (G!Error x G!Ink) {{Slow Updates}} by pesky_pestilence
#10
Gasterly Squichy (G!Error x G!Ink)...by MessiahFIǝND
This is a story about a small puny relationship that soon blossoms into something questionable? confusing? OH GOD CHRIST!?, G!Error can't make up his mind-. Once a littl...
Looming Shadows by Gasterbot
#11
Looming Shadowsby Gasterboy
Hello! first story that's not Undertale shipping/smut/lemons. (Not really ive done drawings etc.) 0///0 Anyway read the story to find out what happens.(AU shit goes down...
Undertale rp by -Kitashima_Itano-
#12
Undertale rpby Kate
yep. I'm doing a short Undertale rp.
Horrid Powers (Undertale/GasterSans/UnderFell) by SuperUnderLittle
#13
Horrid Powers (Undertale/GasterSan...by Blarb
Humans and Monsters finally live together. But Ari has had a long LONG past of troublesome violence. Ari leaves her ex-boyfriend Ryder and finds herself applying a resum...
gaster sans sans × reader  ( DISCONTINUED)  by clearwater356
#14
gaster sans sans × reader ( DISCO...by Cloudjumper
hey guys this is my first time writing a story sorry if some things are mispronounced in this story you wake up in gastertale and you meet gaster sans and papyrus and sl...
When Worlds Collide (AUSans X Reader) by Aries_00787
#15
When Worlds Collide (AUSans X Read...by Aries_00787
Five years ago, the world changed. Five years ago, the barrier was broken. You live in your own little world. Your simple, small, peaceful, world. You are saved fro...
Undertale X Reader One Shots!? (Possible Lemon warning) by SparkWriter87
#16
Undertale X Reader One Shots!? (Po...by MysticWeirdo
REQUESTS ARE NOW OPEN!!! Stories of our favourite Undertale or Undertale Alternate Universes shipped with you, or (Y/N).
You're Mine Only. ((G!Sans×Female Reader Story)) by Wise_Doobie
#17
You're Mine Only. ((G!Sans×Female...by Wise_Doobie
<( ̄︶ ̄)> Eek! This Is My First Story! Hope You Enjoy! (And I Hope This'll Be Good.) I Won't Be Uploading Much Because Of Me Being So Diligent At Studying. *cough*...