1 - 20 of 1,795 Works in Error Sans (Undertale)
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Disclaimers:
Several details in this fic are heavily inspired by 'Blue joins the bad sanses' comic, so go check that out
Canon innacuracies: Passive and Corrupted Nightmare are the same person, Ink is the creator and not the protector, Ink, Error, Nightmare, and Dream, are all gods, Blue, Killer, Horror, and Dust's specific au timelines were all destroyed, and i took liberties with how the void works. Also, no Cross sans will be mentioned, i don't know enough about underverse, and there will be some OC non-sans God/entity/things later on. The fic will be split into parts, each lasting nine chapters.
Schedule: Once a week, on Saturday, Sunday, or Monday, and i will post art or a reference sheet with every chapter. Trigger warnings will be specified in chapter notes. I've never written for undertale before, so please let me know what you guys think :3With that said, the actual plot: After an injured Error crashes into Nightmare and Co's home, a close bond starts to form between the two gods, both forced villains. In light of Ink's attempt to kill Error, Dream finally starts to lose it, and Blue gets dragged along.
Average chapter length is 500-2000
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The Multiverse has a Guardian and a Destroyer. It also has its Creators.
The Guardian guards, the Destroyer destroys, and the Creators create.
It is depressing to believe that you are powerless. Yet, this is exactly what the inhabitants of the Multiverse are. They believe that the Guardian protects them and that the Destroyer kills them. They see the Creators as far off gods; Or, they do not see them at all.
They are wrong. They are all wrong.
They are marionette-stringed pawns in the eyes of the Creators. They are actors for an endless show.
And nothing matters, when you are but a simple actor.
Unless, of course:
You can make a good story.
Or: One-third of the multiverse is destroyed. Nobody is having a good time. Ink has seemingly lost his mind, Error is forced to make some concessions, Dream just wants his best friend back, Blue is questioning his morality, and Nightmare and his crew must adapt.
Series
- Part 6 of Multiverse of Grey
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For a very long time, Dream had been developing bad habits that only grew worse over the years. Now, he would have to face the consequences of his poor life choices. At the same time, his friends have to deal with a looming biological threat that hangs over their heads.
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Fresh didn't think lamias existed that is until getting caught with a fight that their life turns for the better
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With the magical healing powers of ketchup, Sans survives a genocide run--but the rest of his world doesn't. He sets out across the multiverse searching for a family he refuses to believe is dead, struggling to come to terms with his new life and identity and making more deadly enemies the further he goes. When a rival emerges, he's forced to choose between his past and future or risk losing both.
Updates weekly-ish
(Yes, this is absolute crack--but I found out there was no AU where Sans's soul is literally ketchup and decided that was a problem I had to solve. There will be family fluff, plenty of angst, a bunch of AUs, and general shenanigans. I'm treating this seriously enough that I forgot how ridiculous this was until I had to write this summary.)
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The whiteness greeted you as you woke up again. It felt almost suffocating, especially when the only other people with you didn't exactly look or act normal. You just wanted them to emote, even a little bit.
All you wanted was to not be alone but no. You were reborn as Ink after you died in a lonely ditch. Now you have to navigate the vast Multiverse with your knoweledge of your last life. As you get friends and foes alike, you notice that not everything you know is trustworthy. Especially when you're a little lost skeleton with questionable ability to feel.
After all, anything could happen in a place this big.
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Nightmare had noticed right away that their stupid 'brother' didn't properly appreciate the one mortal in his little group— and soon enough, they found themselves stealing the poor song bird right from under their enemies' noses.
"I didn't even think, and then I just—"
"There's nothing wrong with that," Nightmare interjected, their tone firm, "Your actions were justified, and your emotions are valid. You shouldn't feel guilty for standing up for yourself."
Blue paused at the words, his shoulders hunching slightly as he slowed to a stop. He sent them a glance— only to immediately grimace and look away when they caught his gaze. The Spirit paused next to him, patiently waiting for him as he took a shaky breath.
"Sorry," he offered quietly, "I'm… not used to people picking up on things like that. It's kind of strange, how you seem to be… better at this. Than Dream was. He's the Guardian of Positivity and you're…"
"The King of Negativity?" Nightmare finished, a hint of amusement in their tone.
The Guard flushed slightly, a sheepish grin tugging at his mouth. "Y-yeah, uh. Yeah."
Series
- Part 4 of Drabbles, Flash Fiction, & Short Stories
- Part 1 of Broken Ties
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“The claws of the dark threaten to rip the forest apart.”
As Greenleaf draws to a close, tragedy after tragedy strikes the clans, orchestrated by a cat from the shadows. Four cats help the rest find their way, and lead the woods back to peace.
(I don’t know how to write summaries but like trust the fic will be good I am literally cooking rn.)
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9:20pm | Kills 🔪: wait the toaster just exploded
9:20pm | Cross ❌: Not again
9:20pm | Kills 🔪: no generally
9:21pm | Kills 🔪: It is smoking
9:21pm | Cross ❌: Uh oh
9:21pm | Cross ❌: Better go sort that out then
9:21pm | Kills 🔪: Dw Horrors ran to it
9:22pm | Kills 🔪: I might make it worse if I sort it out myself -
It's the end of the world as we know it (and I feel fine) by Enderlovescake
Fandoms: Undertale (Video Game)
22 Jun 2025
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Just a small fic about the gods of my Multiverse.
Series
- Part 9 of Deltaverse
- Language:
- English
- Words:
- 291
- Chapters:
- 1/?
- Kudos:
- 3
- Hits:
- 17
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| - Geno and Error were just good friends, nothing more but Fate decided that maybe things can go more interesting, afterall the balance is in the line, but they seem to be perfect to use.
Or
Geno's life gets fucking ruined
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Sans Tumbles Through the Multiverse Headfirst by PapilioVolens
Fandoms: Undertale (Video Game)
22 Jun 2025
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Sans has finally managed to fix the reset issue. It only required the deletion of a vital character. The barrier is broken, and time finally begins to move again. Recovery is slow, but Sans finds solace in his dreams. By the time he realizes his dreams of other universes are real, he has already grown attached to their residents. And then he's attacked at home and is thrust into the multiverse proper. He finds things very different from how he expected. His old friends don't recognize him, and some of them appear suspiciously older.
It doesn't take long before Sans starts to suspect that he may have a larger role in the multiverse than he predicted.
I wanted more Classic adventures through the multiverse, so here's my contribution. And cause I'm me, I can't help but try to make a saga out of it.
Features Classic being Classic, strange multiversal mechanics, and a sleep-deprived author who 100% knows what they are doing
Series
- Part 1 of STTMH
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This story is written by a Goldfish who had to go through the struggle of having a lack of father figure and coping with having a step-dad!
In this story, Paperjam is neglected by his parents! Ink, not on purpose, Error, very much on purpose.
Now Error wants to make amends with Paperjam, with the encouragement of Nightmare!
Nightmare is a good step-dad, Error has a LOT of making up to do, and Paperjam is a little shit.(Yes gradient is in this too, this poor baby is always left out)
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The Omega Timeline's Multiversity of Science and Magic by WaterLily1
Fandoms: Undertale (Video Game)
21 Jun 2025
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The Multiversity- a college run by Core Frisk and their Omega Timeline Council. It welcomes students from across the multiverse, no matter their backgrounds. While there are always some challenging students, this year boasts an exceptionally wide assortment of unique faces. Many of whom are neither thrilled to be there, nor fans of their administrators.
In other words: A college AU featuring all your favorite Sanses. True stories from wild college experiences sprinkled in with general chaos and disaster as skeletons from various backgrounds are shoved together in a classroom setting and given way too much freedom.
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Oh: In which Blueberry learns earlier (through Error, in the Anti-Void) that his genetic material was used to build new beings: Nightmare and Dream.
He's in shock and overthinking until he concludes that, hey, he wants to meet them. He succeeds, not in the conventional way, but he does… Now, we'll accompany Blueberror on his journey out of the Anti-Void, to observe his practically children.
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Flash Fics for Mimicry by Mochimunchies for Mimicry_Grievous
Fandoms: Undertale (Video Game)
21 Jun 2025
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A short collection of flash fics/oneshots written for Mimicry!
Includes:
Chapter 1 - Afterdeath + FatalDeath (Mer + Betrothal AU)
Chapter 2 - BEI (Mer AU)
Chapter 3 - Kustardberry (Mer AU)
Chapter 4 - Errink (Mer AU)
Chapter 5 - Killermare (Mer AU)Series
- Part 11 of Flash Fiction Giftfics
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Nightmare had been so kind.
He'd said all the right things and done everything perfectly to gain Dream's trust.
When had the proposition turned from the possibility of trust to the promise of power?
Or: Dream gets an invitation to stay at Nightmare's castle...forever!
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If they be Mr Hyde, we shall be Mr Seek by Cosmo_18 for Supreme_Overlord_B0FF, Deadanime_insomniac420
Fandoms: Undertale (Video Game)
20 Jun 2025
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After three intruders bring death and negativity to HavenTale, the Bad Sanses go on a man hunt to try and find this team of people who think they could possibly replace them. They end up with unwanted and unlikely allies and far too many questions.
“my devil had been long caged, he came out roaring”
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Sans is a pretty calm skeleton, then what, or more precisely, who made him lose his temper?
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It has been one month since fifty AUs were DELETEd without explanation. Ink is summoned to Blue’s AU by an emergency call and fears the worst. When he arrives, the AU is safe and Blue, Core, and Dream convince him to stay for a while.
They were not the only ones waiting for him.
Ink's brother is so happy to see him. Everyone else? Not so much.
S̶͔̄o̵͎͊o̴͉͂n̴͎͒ ̷̠̄ï̷̠t̷̜̊ ̵̳̀ẅ̸̩́i̵̻̊l̵̖͗l̷̹̎ ̷̢̕b̴͓̔e̴̜̽ ̷̳͝ṯ̸̐í̷̹m̷̙̎ě̷̫ ̸͚͒t̸͇̕ǒ̶͜ ̵̻͠b̴̅͜r̸̙͊i̸̪͂n̷̗̂ġ̷̬ ̴̡̒t̵͓̏r̴̢͒u̶̲̒ẻ̶͉ ̶̪̋"̸̢͠j̶̘̃u̷͒͜s̶͍̊t̴̢͘i̶̘̇c̸̗̑e̴͕͘"̵̢̈ ̶̰͝t̷͙̏õ̴̤ ̷͇̀t̷̫̂h̶͚̏ḙ̴͊ ̸͔͂M̸̜͠u̴͚̒l̸̲̈ṫ̶̯i̴̛̪v̷̰̿ē̶̳r̶̮̒s̷͎̍e̶̯̿.̷̮̄Series
- Part 3 of Memories of a Protector