1 - 20 of 41,239 Works in Sans (Undertale)
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The main cast of Undertale finally made it out of the Underground... But... something seems strange, especially to Frisk. Where is everyone? Where is humanity? How will the monsters be able to live on the surface? What is... going on?
A Vintage Story x Undertale Crossover
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You’ve finally landed a job as a live-in housekeeper for the CEO of Los Angeles’ new and highest rated hospital. With this opportunity, you can finally move out of your mother’s house. Be independent for the first time in your life. Move on from the past. You even scored a date on Blender, the app specializing in melding monster and human couples. Just in time for the anniversary of your divorce. He’s a handsome skeleton monster. Things are looking up. What could go wrong?
Dust could care less about you. He’s too busy worrying about college. With assignments piling up and the never ending nagging of his brother resonating in his skull, you are the farthest thing from his mind. You’re just another human passing through. Except your picturesque form perched outside his window has become his muse, and despite his seething hatred for your kind, you're the only thing keeping his phalanges moving across the keyboard.
Series
- Part 1 of It Had to Be You
- Language:
- English
- Words:
- 9,209
- Chapters:
- 1/?
- Hits:
- 7
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Frisk Dreemurr, beautiful spoiled brat, had the absolute talent to make people like her, please her, simply said the right words, looked as gorgeous as ever and in her small palm she had them.
She was his responsibility, he had to keep her in check, watch her every move, keep her safe, take care of her, be there for her if somebody hurt her, even if that somebody was him.
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Slay (SAVE) the Princess by CrossoverAU
Fandoms: Undertale (Video Game), Slay the Princess (Visual Novel)
01 Nov 2025
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You are in a basement in a cabin.
That cabin is in the woods.
In the woods, on his way, is a skeleton
He is coming to kill you.
Will you let him?
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You just won a spot on Mettaton’s dating show! Now what?
- Language:
- English
- Words:
- 16,155
- Chapters:
- 4/4
- Hits:
- 34
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Mamamangoverse Memes and Incorrect Quotes by Mamamango123
Fandoms: Hazbin Hotel (Cartoon), Murder Drones (Web Series), Five Nights at Freddy's, Deltarune (Video Game)
01 Nov 2025
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So yeah, I just thought of these and thought it'd be funny
Series
- Part 11 of The Mamamango verse
- Part 5 of Mamamangoverse miscellaneous fics
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The Serif household has been through many odd scenarios. After all, they are entirely comprised of other versions of the same two skeletons who got stuck in the world they have called home for six years, unable to return to their worlds and thus forced to carve out a life for themselves until further notice. All things considered, they found their stride and adapted to the ongoing weirdness of universe hopping.
That is, until she arrived. Flora, a woman so out of left field and disrupting their normality, appeared in the basement, battered and bloodied to hell and back. Stuck like all the others who had appeared before her, the Serif household is forced to accommodate her until she stabilizes, slowly beginning to get to know the lackluster and stone-faced woman who ensures they don't injure themselves via stupid means.
Few expect her to open up. Fewer expect her to accept becoming friends.
None expect for any of them to become much, much more.
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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:
- 9
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Summary
(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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Kidnapping the Boss and giving him the happy childhood that he deserves by catdemonakatsukigirl
Fandoms: Undertale (Video Game)
01 Nov 2025
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When Killer decided to bring some unknown science experiment into the castle, the last thing they expected was time travel. But hey now they have the most adorable baby bones ever, their boss Nightmare who doesn't know who they are and oh yeah is also 5.
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You're no one special. Just another human living with a single parent. Your life is pretty boring, or so you think, but then one day you wake up and it's not in your bed...
Series
- Part 42 of Sentinaltale & AUs
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Monsters and humans have had their differences, but none have been so much in conflict with the kingdom of monsters than the monarchy ruled by Queen Chara. Known by monsters as the "Bloody Queen" for ruling with an iron fist and dabbling in the forbidden arts. No monster has been able to stand up to her. Rumor has it that she harbors a powerful weapon, the secret to her power and the key to her downfall. A single monster, after many centuries of failure, makes it past the guards and into the room that holds the weapon, but it's not what he or anyone else was expecting...
Series
- Part 26 of Alternate Timelines
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The Last Amalgamate (The Peacock AU edition) by WingsOfShen
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game), Kung Fu Panda (Movies)
01 Nov 2025
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After millennia, the barrier keeping the monsters Underground has finally broken. The entirety of the Underground does not remember what happened. All that is known is that a living human child was involved.
Before starting a new life on the surface, Frisk joins Alphys in sending the final amalgamate back home to her family, making new friends along the way and giving them their much-needed happy ending.
(Based off "The Last Amalgamate" by VyletBunni and the DeltaTraveler team. Credit goes to them for the animation series.)
Series
- Part 4 of The Peacock AU
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A shocking realization has come to Kris: They are in love with all their best friends. Simultaneously. And the worst part? Kris is pretty sure none of them suspect a thing.
Now, how the heck would they actually go about confessing? To their horror and astonishment, Rudy, the SOUL and...Sans...come to the rescue.
This is going to be messy.
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Homeless and guarded, Susie reluctantly accepts help from Undyne, Hometown’s tough yet caring police officer. As they share a roof, both begin to uncover trust and hope in unexpected ways.
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Kris can't get over the idea that they've doomed both of the Holiday Sisters in the same way.
They will never recover from this.
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I’m safe here (I’ll wait for a brighter day) by Ultimate_Sugar
Fandoms: Undertale (Video Game)
01 Nov 2025
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Gaster introduces his littlest son to a brand new game they can play, just the two of them.
This can only go well, of course.
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A Jaded Emerald by KTamao205
Fandoms: Harry Potter - J. K. Rowling, Undertale (Video Game)
01 Nov 2025
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Summary
Abandoned on Mt. Ebott at the tender age of five, young Harry's unsurprisingly died, but Death's always had a weird relationship with his variant... Meanwhile, before Flowey's revival as souless talking flower, Sans makes a discovery under the mound of snow, Papyrus has always wanted to be a big brother anyways.
*Edited Summary (29/09/2025)
Series
- Part 1 of MultiTaleVerse
- Part 1 of Arcalith
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Timers by blue J (sanstimer), sanstimer
Fandoms: Gravity Falls, OMORI (Video Game), Undertale (Video Game), Amphibia (Cartoon), Ib (Video Game)
01 Nov 2025
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Friska Timer, the mother of Lisa (frisk) and Ivy timer,
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