Undertale/Deltarune/AUs
62 stories
We Are A Family (Multiversal FGOD Error Fanfic) by Sarah_Skelecat
We Are A Family (Multiversal FGOD Error Fanfic)
Sarah_Skelecat
  • Reads 123,693
  • Votes 3,630
  • Parts 14
This picture does not belong to me, it belongs to Iyoth737 on deviantart. This is inspired by @harrish6 and their "Falling Into A Different Destiny" NaJ story. Read HWHBB and FiaDD before this. Thank you. Enjoy (or not)!
Sans' House Guests (CreepyPasta x Undertale) by BubblyShip
Sans' House Guests (CreepyPasta x Undertale)
BubblyShip
  • Reads 175,178
  • Votes 7,000
  • Parts 27
The surface was not what Sans thought it would be. Lack of communication skills, communication in general, and social interaction had driven him into a depressed and anxious state of loneliness so deep that it'd take a gang of serial killers to help drag him out and fix his problems. Literally, it took a gang of murderers called CreepyPasta just to set things right. The world acts in funny ways. (REWRITE IN PROGRESS - Be warned, this story is old and is not properly written to handle certain topics regarding mental health.)
Shadows Of Remorse (CreepyPasta x Undertale) by BubblyShip
Shadows Of Remorse (CreepyPasta x Undertale)
BubblyShip
  • Reads 163,019
  • Votes 8,491
  • Parts 63
(This is the sequel to Sans' House Guests, you should go read that before you read this because you will be confused on what the heck is happening! Read the first story here: https://www.wattpad.com/story/192345936-sans%27-house-guests-creepypasta-x-undertale ) After the events over the months, Sans had finally called out to Slenderman and was taken to the mansion, where he would finally find peace with who he was. Surrounded by friends, he was going to be happy finally. Running from the law now, and taking care of serial killers, it was an odd joy for him. But he was still happy, and that's all that matters. However, others from his past lurk beneath their shadows of remorse, and Sans has to deal with more troubles.
Undertale sin pictures by _Photo_Sans_
Undertale sin pictures
_Photo_Sans_
  • Reads 42,271
  • Votes 277
  • Parts 2
*h-hehe! U-Um Yea! These are gonna be sin pics of I dunno.. s-s-sin! O-Only s-sanscest, p-papycest, And p-possibly.. AU f-foncest for example s-swapcest. *Photo begins to look very flustered
Undertale and au! Oneshots  by undertailsanzz
Undertale and au! Oneshots
undertailsanzz
  • Reads 195,388
  • Votes 2,353
  • Parts 21
A whole book of oneshots there is underfell ,dancetale,wondertale,and underswap!and many more!
Blood that drips  by _QuartzCrysta_
Blood that drips
_QuartzCrysta_
  • Reads 4,713
  • Votes 136
  • Parts 8
Encre, a famous artist in a small village has always stayed indoors. She found winter in her days and desires to paint the beautiful scenery. She went into the forest to paint the snow falling on the trees. She spent time there, knowing this forest was roaming with vampires she ignores it. She didn't know what ignoring it could do. She made a very deep mistake. What will she do when one tries to take her? Find out now in Blood that drips.
Undertale and Creepypasta Oneshoots by EmilySkelewolf
Undertale and Creepypasta Oneshoots
EmilySkelewolf
  • Reads 13,005
  • Votes 379
  • Parts 7
I've made Undertale Fanfics. I've made Creepypasta Fanfics. It is time to do the impossible. I'M PUTTING THEM TOGETHER! TAKE THAT YOU MOTHER FUCKING HATERS! All images belong to their owners.
interitus×decay by EmlettOmelette
interitus×decay
EmlettOmelette
  • Reads 7,018
  • Votes 233
  • Parts 9
201X. Why the "X"? That's because little Frisk wasn't quite the best at counting. And the calendar over their bed was about three years (five years?) too old. They DID know how old they were, though, and they didn't really have the tact to care about much else regarding numbers. Much less the number of people that weren't around anymore. Who knew how long ago it was now, but Frisk still remembered when the orphanage was filled with tons of other kids (most of which avoided them entirely.) Now, since the surface went through nuclear fallout, they were surprisingly one of the few people in the world to survive. Sure, they knew there had to be tons more, but still - when everyone who used to be around just stopped all at once, you really had to learn how to take care of yourself. And they did. One morning, while out on a supplies run, they must've made a wrong turn or something, because they ended up falling down a mountain. And apparently, monsters DO exist, and they're in a bit of trouble themselves. A disease called the "Black Mold" has broken out over the entirety of the Underground, killing off almost all of those unfortunate enough to catch it. Monsters are sick, dying, or long gone already, and nothing will ever be the same as it was before the illness contaminated the monster king, Asgore, leading to his untimely demise. With the cause (or cure) of the disease still unknown and highly contagious, along with no hierarchy left to lead what's left of the monster race, there's only so much a dying kingdom can do. However, Frisk's big heart finds a need to go and try to make things better for the monsters. Little do they know how sad, angry, and dead the Underground is, these days... Welcome to Devastale. (DECAY IS THE OFFICIAL STORY OF DEVASTALE. DEVASTALE BELONGS TO @pastarru . UNDERTALE BELONGS TO TOBY FOX. STORY BELONGS TO @pastarru AND I. ART BELONGS TO @pastarru .) Also available on Archive of Our Own.
Creepypasta/Undertale pics by EmilySkelewolf
Creepypasta/Undertale pics
EmilySkelewolf
  • Reads 5,258
  • Votes 253
  • Parts 27
No pics (except cover) are mine.
Reset (Underfell Brothers) by solonelyn08
Reset (Underfell Brothers)
solonelyn08
  • Reads 13,728
  • Votes 764
  • Parts 43
Papyrus was doing his normal schedule, waking up in the morning, shouting at his brother to wake up, and if he is late, you know who is getting the beatings. Usually, Sans would be terrified however, lately Sans has been different. He woke up on time, never sleeps at the sentry and frequently does mistakes. When he does, he would often gave an apologetic smile, never once he be upset or scared or angry at Papyrus. What really happened to his Sans? - Not a Fellcest- All Characters belong to Undertale except for Captain Rogers.