1 - 20 of 251 Works in Scientist Sans (Undertale)
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The dichotomy between black and white is your constant when it's time for you to meet the whole new civilization Frisk brought along with them to the Surface.
As a parent, it's not easy to trust others when they've hurt your child.
So when that new civilization decides they owe Frisk both for saving their kind and for still hurting them during that process, you've got plenty to say to them.
Forgive as easily as you once did with others during a stage of naivety? Oh, hell no.
They better have a good reason for hurting your child and an even better one for wanting to be a part of their family.
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Full Arc List:
Arc 1 | Ruins
Chapters 1 to 15 (✓ complete)
Arc 2 | Enemy Approaching
Chapters 16 to 25 (✓ complete)
Arc 3 | Pathetic House
Chapters 26 to 30 (× current)
Arc 4 | Spear of Justice
Chapters 31 to 40
Arc 5 | Here We Are
Chapters 41 to 50
Arc 5.5 | Good Night
Chapters 51 to 55
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(Important Notice: If this work seems familiar, it was originally published in 2020, but was deleted due to various health issues!)
(OLD WRITING LASTS UNTIL CHAPTER 25.)
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Alcohol.
How did it all start? Maybe it was those girls and their cruel remarks? Perhaps it was when your father left for some new family? Could it have been that goodbye text from the only person who truly knew you? Or maybe it was all of the above, mixed with how easy it was to throw back a swig and let it all go?
The bottle became a solution before you realized it was a problem.
One to calm the nerves.
Another to blur the memories.
A third to forget how ineffective the other two were.Relief. Hangover. Recover. Repeat.
Eventually, the relief stopped coming, no matter how many bottles laid empty, the pain seeped through the cracks in your defence - so you looked for a different escape.
"Legends say that those who climb the mountain never return."
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You've admittedly avoided monsters for about the same reason you avoided people. You just don't exactly care to make any more friends. With a cat at home and two close friends you occasionally hang out with, you've decided that this was all you need.
Oh, and cooking, you needed that too.
On a trip to the grocery store for some ingredients for a new pasta dish you've been wanting to try, you run into a very tall someone who shares similar interests. You never expected for this monster to accidentally guilt trip you into numerous nights of cooking and interactions with his stand-offish brother.
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Sci is working instead of sleeping again (to absolutely no one's surprise).
Series
- Part 24 of Scifell
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W. D. Gaster: the Heart, the Brain and the SOUL by WittyWind
Fandoms: Undertale (Video Game)
13 Aug 2025
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“The weight of the head of a genius is equal to its value.”
W. D. Gaster didn’t want to admit it, but he could feel it, deep inside him.
His brilliance gave a future to the Underground, a machine that could convert the heat of the Earth into energy: the CORE. The other monsters would, then, use it as electricity, and bring life to their houses and their TVs and their cars and their cell phones.
But Gaster knew more. Knew better. The CORE had so much potential, so much to offer. That kind of magic had never been used before. Gaster didn't know if he could call it “magic”, even.
He was so valuable to the Underground, but… what if that made him dangerous? What would happen if he had discovered something that shouldn’t be touched, not even by monsters or humans?
W. D. Gaster didn’t want to think about it, but he could feel it, deep inside him.
What is the value of a genius, if he’s so terrified of the weight of his own head to ever use it?
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A Error and a Dream crash by a multiverse on the brink of destruction, will these two bastards fuck around and save this place local idiots or will they have to flee with their tails between their legs as a greater danger is targeting the multiverse they're in?
Where will the fate of this multiverse go? Will the friends succeed, or will this place end up like countless other multiverses?Aka - two friends go clean up the mess left by another bunch of idiots but things get a little more complicated than they initially thought.
Heavily inspired by His Story , I really enjoyed it.
Also the original ver Его история
You should definitely give it a try if you haven't already.Series
- Part 1 of The Zero Infinity Crew
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Using Frisks Soul, Asgore manages to bring down the Barrier, in the process absorbing the souls and becoming a being of unfathomable power. Using a monster army and his newfound strength, he takes over a town at the base of the mountain.
Monsters become the reigning power, and a human slave trade blossoms in "Overground" (so named by Asgore). Monsters own humans as butlers, pets, and entertainment.
Sans never thought he would personally own a human servant, but after a chance encounter, he has to face his worst fear - living with the same creature as the one that haunts his worst nightmares.
Series
- Part 3 of The Butterfly Effect 💚💛🧡💜💙🩵❤️
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After one of Epic's parties, an unwell guest causes unintended havoc on some of their closest friends. Soon, an epidemic starts and the disease spreads throughout the multiverse.
Series
- Part 2 of The Compromise
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Frisk is your baby and you’d do absolutely anything for them. Every bit of money you make from your three jobs goes to them. Then, after a messy encounter with their father, they go missing.
You never expected to see them emerge from mount ebott with a whole new race of people. With monsters.
Once again, you’d do anything for Frisk, even if that meant abandoning your apartment and living with monsters. But hey, maybe it’d be good for you to make new friends, form new relationships. It had been awhile.
And you find a certain skeleton very funny.
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finally coming back to writing after a while, ill update as much as I can, feel free to comment any suggestions or correct me on anything!!!
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Their King is dead. The six Souls are Gone. Their future lays in ruin.
Frisk has slipped through the barrier and left the monsters with shattered hopes and a toppled monarchy. With no witnesses, it was pure, selfish regicide. They were loved by all, and thus, their betrayal cut all the deeper. For the third and final time, humans had stolen everything from them.
Anger has a way of changing people. It remains in the Soul even as memories fade.
Frisk may be gone, but the RESETS continue, multiplying the resentment within them and morphing the residents of the Underground into tightly wound reflections of their former selves. No longer in a position to do nothing, Sans is Determined to find a way past the barrier for the sake of his brother, and for the sake of justice.
He’ll give anything to achieve that goal. His Soul included.
He’d found an alternate method that should work, buried deep inside a gilded dusty tome in the royal library. Instead of using LoVe to pass through the barrier, Sans was going to use love. He was going to have to gain a consenting human, and convince her to bind her Soul to his. Permanently.
Series
- Part 4 of The Butterfly Effect 💚💛🧡💜💙🩵❤️
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Kiss Me, Kill Me (And a Secret Third Option) by Embrace_the_Deep (DefinitelyNotABee)
Fandoms: Undertale (Video Game)
28 Jul 2025
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Summary
What had Ink tried calling him again?
Someone named Killer?
As fitting as that name would have been for the previous owner of his body, he clearly remembered that he had been referred to as 'Sans' in the blurred bits of memories.
Maybe he was being mistaken for someone else.
He hopes he never meets this actual 'Killer', but even if they were some sort of shady person- skeleton- thing, that doesn't excuse kidnapping a stranger and chaining them to the floor of your home after nearly killing them!
With the most unimpressed expression he could muster, Quill forced the aching phalanges of his right hand into a wrist-up fist, and extended his middle finger.i.e. A self-indulgent crack-treated-seriously fic featuring isekai!Killer vs. the Multiverse. Enjoy!
Series
- Part 1 of The Third Secret Option
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It's been three moons since Night killed everyone in his village. Its been three agonizing, heartbreaking moons since he had killed his brother.
There's not much to do in a soulless world. This changes, ever so slightly when he hears a desperate call from someone in the abyss.
Night doesn’t know what to make of his new situation, and he can't bring himself to move on just yet from the horrors he's committed. But life demands his interaction and input, so he forces himself up anyways.
Dream would do the same, if they were here. But they're not, so Night might as well pick up the slack.
Series
- Part 1 of One Hand Offered
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new summary:
A long time ago, a skeleton with black tattoos found themselves alone in a white void, in one story, that skeleton went and became beloved by the multiverse that he protected, but in another, in this multiverse, that skeleton never took that journey, and stayed hidden, avoiding attention, the multiverse remaining unaware of their existence for years and years and years...until someone, dream, noticed.
(old summery:
I always liked the image of ink being a homeless hobo skeleton creature with no sense of shame or social norms, having no idea how to math because they have no actually education and basically clinical insane, I also like to imagine that by following his rule of "don't interfere with the goings on of the multiverse" he would act feral as fuck, So this is exactly what this is, dream and blue basically trying to tame the multiverse guardian ink. but like way more plot based)Series
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You fell into the Underground as a child. You spent a few years there, growing up with the skeleton brothers. Life wasn't great, painful at times, however you had your family with you. A change came to your life, one where you were surrounded by alternates of your skeletons. They were nosey, pushy, and much louder than Papyrus. They were nothing like your skeletons, and you very much didn't approve. You didn't know how to act, you didn't know if you could trust them, didn't know how to trust them.
There were too many factors. Monsters were there that you couldn't be around. But maybe.. some can help you?
Series
- Part 12 of Reader Inserts
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Red Bones (Uf!Sans) won a scholarship at the St. Wendell Ebott University, a secluded University in Maine, and goes abroad to study at the Tōkyō Rika Daigaku (Tokyo University of Science) to become a Bachelor of Science. With his late father’s last savings, he flies to Tokyo and takes residence there.
Sans Serif (Ut!Sans) is offered a position as a teacher at the prestigious Tokyo University of Science. Having won a Nobel Prize in Physics 20XX for his findings in quantum physics, studies of multiple alternate universes and The Void. He is ready to impart his wisdom to the masses as a part time professor.
What happens when these two collide?
Drama unfolds!
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When Jane Ainsley finds herself trapped with monsters Underground, it's hard not to fall into old habits. The kindnesses of monster-kind make it easy to become complacent, when she had spent so long avoiding companionship. However, the ever-present pull of the Void keeps her moving forward, towards someone only she can SAVE. In helping Dr. W.D. Gaster find themselves once again, can Jane form her own sense of identity?
An isekai-adjacent story starting Underground and featuring an anomaly that is not our narrator.
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Sans and Alphys learn about timelines. They... don't react well to this information.
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Sans AUs texting group chat? So close! Welcome back 2020
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It was bright. Too bright, what had just happened? Flickers of memories passed through Sans’s mind in a whirl. “Doctor Gaster!” He heard a faint scream. It was muffled under his own screaming of his mind.
“Someone get the kids out of here!” Another voice said. The bustle around him felt as if it was going in slow motion. The colors faded from his vision as he collapsed onto the floor.
“Brother! Wake up!” A small voice peeped. Sans felt his consciousness fade. The nausea he felt was too strong, and he welcomed the darkness.OR
Sans is left to care for his rambunctious younger brother Papyrus, his health suffers as a result of overworking. On top of that: memories of the past plague his dreams. Sans must work to overcome his trauma while also allowing himself to be supported by those who care for him. Tags to be updated as chapters are released.
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After his fifth overtime shift in a row, Sans is as tired as he is tense.
Good thing he has a secretary to help him with that.
Series
- Part 2 of Smutty Sans/Reader One Shots