1 - 20 of 8,744 Works in Sans/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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Dream decided to visit his brother after the truce
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"He opened several portals in rapid succession[...]even Dusttale#6 for good measure[...]He swore he saw a flash of surprised red eyelights somewhere in that sequence, but eh, that probably would never be relevant to him."
No, it wouldn't be relevant to Check. Nor the Multiverse he dwelled in, not significantly. But that one moment brought DETERMINATION back to the Sans of Dusttale#6, Helvetica. He'd thought his universe cut off from the Multiverse, after losing connection to Underfell#143, when his Universe's code changed from Undertale to Dusttale.
But now, he believed different. He could get Carmine back, despite how much he had changed. Then they could find a way to flee to a different Multiverse altogether, free of the bounds of their Universes, because surely that was what that sight was. A version of himself who had learned to hop Multiverses.
Or; Butterfly effect. (This is a backstory piece to a potential future series. Does include established Dustard/Dustfell. This [unnamed] universe will have more shippy stuff than Checkverse {and is also technically my excuse to show off some of my fav rarepairs})
(VERY much a warmup piece for this AU, shorter than my regular stuff :P)
Series
- Part 9 of Checkverse
- Part 1 of Placeholder Title (The Multiverse Crossover Fics)
- Language:
- English
- Words:
- 1,478
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 11
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(shortened desc - i made the og too long again lol whoops :P)
Dust hated Killer. He hated his stupid smirk, and her teasing words, the stupidly casual tricks with knives. The way Killer was so effortlessly pretty. His empty eyesockets, holding space for galaxies within, her quiet excitement when his SOUL was more normal and she could feel again, his gentle touch as she bandaged Dust's wounds. Dust hated Killer.
Killer hated Dust. He hated his smug grin, and his inane ramblings, the stupidly casual display of his insane magic control. The way Dust was so effortlessly pretty. His shining eyelights, DETERMINATION blazing within, his quiet excitement on kinder days when his past did not haunt him quite as fiercely, his careful touch as he wiped away Killer's tears. Killer hated Dust.
And yet still SOULs fluttered despite genuine frustration. Self hatred directed onto someone so much like themselves, for they were once the same. Everyone dead. Torment. Genocides. And somehow, despite it all, a hand to hold. So what if they got their hands a little dusty?
(Canon to Checkverse. Technically can be read as a standalone, but looks at you with my big sad eyes please pleaseeee read my fics)
Series
- Part 5 of Checkverse
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Bad At SOUL (But Sweet At Heart) by BlazingFieryMountain
Fandoms: Undertale (Video Game)
01 Nov 2025
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Filled with LOVE and love. DETERMINATION and HATE. Hope and despair. Willing or not, they ended up in Nightmare's Gang.
In modern days, they hold each other close and bear the brunt of the pain for each other.
But they didn't start out that way. Nothing close to it at all. No, despite their care they hold now, nothing would change their origins, of blood and dust and pain and HATE and LOVE and violence.
This is that story, of how their LOVE softened into love, how painful beginnings beget kind endings all the more sweet for their suffering.
Or; How Nightmare's gang got recruited, and a cruel dictator became a patient parent of four. (Bad Sanses recruitments/backstories.)
Series
- Part 4 of Checkverse
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He had been serving ‘the one who takes’ for quite some years. Most of the creatures in the batches of new recruits either died or betrayed their king.
But Cross would never do that. The god had given him a home, friends, a new purpose, a second chance at life to prove his worth. In exchange Cross served him, stayed by his side, devoted his life to him in such a manner that it almost could be called worshiping. He was a god, afterall.
Cross knew he would do anything for Nightmare. He’d kill for him, had killed for him, he’d protect him, even die for him. And if that couldn’t be achieved, well, then he’d die with him.
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Just some short stories. Most of them are based off actually real stories I've heard before, others, are just from my mind.
I'd say their pretty good. (but no promises)
They're about Undertale AU ships. You may request a ship or even story ideas.
Please read. Or don't. I don't care. -
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Cross finds himself responsible for the death of his universe. After years in the white unending void, his tears summon Nightmare, who brings him back to the Castle.
It’s the aftermath of a more brutal XTale au, where Cross deals with PTSD and OCD, while trying to make a place for himself in the gang. It’s difficult, when you make mistakes left and right.
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Basically, I realized there's a lot to keep track of over in The Importance Of Proper Folding Technique. I've got a bunch of charts and reminders in the Google Doc. So charts that might be helpful to following along, as well as any extra materials I feel like publishing, will go over here.
Series
- Part 2 of Specifically Skeleton Smooching
- Language:
- English
- Words:
- 143
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 31
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KillerVlogs uploaded a new video!
Tape #00: Calling Creepy Numbers
"A company? A friend? Simply someone to talk to. I've been... lonely as of late." The line went silent for a moment and before Killer could answer, the voice asked. "Are you perhaps... interested?"
KillerVlogs is currently live!
Now Streaming: Help Me
"How long are you going to keep me here?"
The camera positioned on uneven surface. A broken leg propped on one of the small chairs and beyond that, an easel was positioned along with a canvas effectively blocking the figure currently painting the holder of the device. The soft light of the morning from the windows betrayed the air of discomfort. The comments of the live stream pour like heavy rain.
'GET OUT!'
'RUN!'
'Is this true, like no ARG shit? Somebody call the cops!'
The figure behind the canvas paused from dabbing the brush delicately on the image. Killer just know that his host was sporting a sweet smile as he said:
"As long as it takes."
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IT'S THAT TIME OF THE YEAR!
Kinktober time~!So yeh this is basically short drabbles of smut. Some will be longer, some will be shorter but I'm gonna try my best to make them juicy~
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Writing ideas that come to me at the moment, which may or may not be inspired by: Music, my drawings (or others), and/or other fanfics/videos.
For example: (I drew this)
Title: "The Radical Paradox" -Idk-
Relationship: Brotherhood.
Where Fresh (a parasite) feels a certain need to check on Doc (or Sci) to see if he's okay. This happens when Doc receives too many visits due to his knowledge of the multiverse, which leaves him exposed to danger and other... insinuations.
No one is happy with this arrangement (right?), which leads to various situations.- Language:
- English
- Words:
- 2,214
- Chapters:
- 2/?
- Hits:
- 13
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Error wakes up in a game he never chose to play—Until The Last Breath, a brutal survival world hidden between life and death. The only players? People trapped in comas. The only way out? Win.
To survive, he must fight through deadly floors, forge uneasy alliances, and follow three unbreakable rules:
[ 1. GAME OVER means death, both in-game and in real life. ]
[ 2. Artifacts must be crafted from Fragments found throughout the world by a Player. ]
[ 3. Reach the final floor before the chronometer runs out… or fade away forever. ]
There are no second chances. No resets. Just one question: can Error and his team beat the game before it beats them—and can love survive in a world designed to tear everything away?
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' ' All it takes to change the course of history is the will of a single man. ' '
OR
A remnant from his old universe makes himself known, wrecking havoc unmatched by even Nightmare standards.
Will the Stars prevail? or will hope be lost?- Language:
- English
- Words:
- 1,413
- Chapters:
- 1/?
- Hits:
- 17
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Red wakes up in an AU that's not his own. After being taken in by Sans, his adventure begins. Drama, violence, silly insults, actual serious moments, romance, and more!
I don't know what tags to use, so tag suggestions are welcome! -
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The tortured artist was a stereotype for a reason.
Except Ink had perfected the formula, and they hadn't even died yet!
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Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
31 Oct 2025
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New kinktober! One chapter a day for the entire month!!! With a list I made myself, very excited to show everything I've written.
Just like the other ones every chapter contains some form of hypnosis/mind control/brainwashing. I'll do my best to tag but i can't tag absolutely everything so look at the warnings at each chapter or in the table of contents.Series
- Part 14 of Undertail hypnosis series
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First kinktober ever, list isn't complete but trust it will be done by Halloween.
Dedicating this fic to my very very special friend of mine. Pookie, if you see this, ily <3
Uh yeah, hope y'all enjoy ^^
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The first anniversary of the Truce between the Bad and the Star Sanses Nightmare hosts a party at the castle for all to attend. We meet the players in the party.... At the end an unexpected guest to the multiverse makes their apperance....
The tags will constantly be updated as the story goes
Series
- Part 2 of Into the Multiverse
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Fanart of fics I like by Froggy_bot
Fandoms: Undertale (Video Game), Original Work, Life Series | 3rd Life SMP Series, SCP Foundation
31 Oct 2025
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This is just going to be a dumping ground for all the fandom related art I do. Some might be of fanfics, others may just be an AU of my own creation.
Comments and kudoses are very appreciated!
Requests are open!!!