1 - 20 of 40,966 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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The host, the trial, and the smell of hate by Youareagoldfish
Fandoms: Undertale (Video Game)
04 Oct 2025
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Set in the shifter au, Papyrus is a shifter.
He is found out, and those that called themselves his friends have found a way to discover when and how their Papyrus was killed and replaced.
Uh, the process makes him pretty sick, and then I get to write lots of hurt comfort :D
- Language:
- English
- Words:
- 4,233
- Chapters:
- 1/1
- Hits:
- 0
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waiting for the world to turn once more by Candy_Cryptid
Fandoms: Undertale (Video Game)
04 Oct 2025
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There’s a particular one that catches his eye. It seems bigger than Ink from where he stands, hanging from the left upper wall above some shelves.
It must have taken several hours to be this big. Despite that, it still takes Ink a moment to find himself. His figure is on the side in the display, off-centre, small.
Series
- Part 3 of Inktobertale 2025
- Part 5 of Ink’s Adventures
- Language:
- English
- Words:
- 580
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 4
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Bonus Content by SpectrumWriting
Fandoms: Undertale (Video Game), Deltarune (Video Game)
04 Oct 2025
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Summary
Something has gone wrong.
Ten years into their happy ending, Frisk wakes up back in the Underground with no memory of reseting.
A few hours after parting ways for the night, Kris and Susie wake up in a strange new Dark World... again.Frisk's save file has been corrupted. Kris's soul isn't behaving how its supposed to. And Ralsei shouldn't be here at all.
An epilogue and a story half-told can't coexist without some conflict involved. -
A Psychic Falls Under A Mountain...Wait Where's The Punchline? by m0ssycobble
Fandoms: 斉木楠雄のΨ難 | Saiki Kusuo no Sai-nan | The Disastrous Life of Saiki K., Undertale (Video Game)
04 Oct 2025
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It was bad enough that Sans could remember the resets, but the kid had been doing nonstop genocides for a while now. It didn't help that after their latest reset the tremors started. Folks swore the mountain was caving in, luckily there had been no casualties. Sans hoped that if Alphys found anything in her and Asgore's investigation of the unusual tremors she would come to him
On a whim, he decided to check his timeline reader. Maybe the anomaly did something? What he saw shocked him: The resets had stopped (for now). He almost celebrated when he looked further ahead and his heart dropped; there were more resets and timelines than ever before. When he next saw the kid he was going to give them a bad time
Months later, Tori asked him to make a promise that he would protect any human that walked out the ruin door. Finally. The kid must have reset about 100 times just in the ruins alone.
The next day, Sans shortcut in the woods to wait for Frisk's arrival.
The door opened and a short figure walked out. Before Sans could "greet" the human, he caught sight of pink hair.
That wasn't Frisk. What the fuck?
Series
- Part 1 of Forced Universe 'Cutting
- Language:
- English
- Words:
- 2,638
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 11
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Summary
Nightmare's sick of Killer's visits and attachment to Color, he finds a way to ruin the only other thing that makes Killer happy.
Series
- Part 4 of Kinktober 2025
- Language:
- English
- Words:
- 2,762
- Chapters:
- 1/1
- Hits:
- 43
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the big kinktober 2025 special by ohitsthatguy for YeeSans
Fandoms: Undertale (Video Game)
04 Oct 2025
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so uh
i am writing and dedicating all these works to a very very special friend of mine, pookie when you read this, hi ily <3be aware i have no shame so a few of the chapters are on the really weird side of things, so please read over individual tags and warnings provided
happy gooning and spooky month for you all <3
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I'll Buy Ya Dinner Later (Kinktober 2025) by merrinbrite for Sinsational_Sinnabon
Fandoms: Undertale (Video Game)
04 Oct 2025
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Prompt: Strangers
Bara Sans Underfell x Reader
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Error is injured in battle and someone just wants to help.
Series
- Part 3 of Fictober 2025
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You'd never expected to be one of those people who bonded with a random stray, and if you did, you never expected it to turn out like this. The tiny... blob of an animal was cute, affectionate, and melted your heart before you'd even named him. Unfortunately, not everything is as it seems. You've met this lovely creature before, and he definitely remembers you...
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beauty and the... skeleton monster? by bigtitsbiggerheart
Fandoms: Undertale (Video Game)
04 Oct 2025
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A blind date, your only hope to get the manchild who keeps pursuing you day after day to leave you the hell alone. Unfortunately, the skeleton monster with a bit more edge than finesse might lead to more than just a blind date.
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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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- Language:
- English
- Words:
- 1,675
- Chapters:
- 1/1
- Hits:
- 32
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Sans is the Bane Of Your Existence. Pranks and Puns haunt your days whenever he is near. Unfortunately, Papyrus is your best friend, and you'd do anything for him. Even if that means taking care of his brother after an experiment gone wrong turns him into a massive, and even lazier, house cat.
Series
- Part 1 of Turned Into An Animal (Sentence Prompts)
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When Sans finds himself unwillingly involved with the work of his father; the next human soul comes into play… how is he going to get out of this with him and his brother safe?
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Human and Monster conflicts are at an all-time high, so you use an opportunity your college gave you to visit the UNDERGROUND to learn more about its residents. You meet some new friends while you are down there and decide to help advocate for monster kind, however as you spend more and more time in the underground weirder and weirder things keep happening. On top of that someone seems to be taking an interest in you, but they do not know how to handle their emotions and do not quite trust you. Thankfully, you're not going anywhere.
- Language:
- English
- Words:
- 3,429
- Chapters:
- 1/?
- Hits:
- 5
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A Future Without Them by Baddrummer
Fandoms: Deltarune (Video Game), Undertale (Video Game)
03 Oct 2025
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Summary
Years pass. People grow. The world moves on without you. The Angel grew content with that for a while. It still hurt whenever they thought of the world that had long banished them, but something new pulled them out of the depths. Now, the Angel walks amongst friends who swear that they will not be banished. Kris, Susie, and Ralsei mean everything to them. Maybe this time, their banishment doesn't have to be as set in stone as they thought.
The Roaring comes. The light falters. Everyone falls.
A desperate connection is established in an attempt to save what remains of the Angel. If they fall, all hope will be lost. The world that banished the Angel long ago has forgotten them, but they have not forgotten it. This connection will have to be enough. Even if the rules have changed irrevocably, the Angel's one goal remains the same: Find them.
Series
- Part 2 of Clawing Toward What Hope Remains
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Another year another Inktober. Here's my contribution.
All set in the same AU unless stated otherwise. -
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Dust scared you. He scared you more than all the rest of his team put together. That being said, you were going to help him through this little mishap even if it killed you.
Series
- Part 2 of Turned Into An Animal (Sentence Prompts)