1 - 20 of 2,867 Works in Papyrus & Sans (Undertale)
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“Thanks, Paps.” Sans replied, taking the blanket and dropping it over the sleeping human. Proceeding to give the child an affectionate pat on the head. The sight made Papyrus think of when he and Sans were younger.
Seeing his brother in such a state filled Papyrus with his own feeling of euphoria. After all his brother has done for him, even including all the times he has annoyed him with the puns, Papyrus felt that Sans deserved his own bit of happiness. His own chance to have the life he wants.
Or essentially five times of others witnessing Sans acting as a Father towards Frisk, the one time he admitted it.
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Just when her story was about to become a forgotten tale, Queen Toriel Dreemur returns to the Underground. She shall make her way from the Ruins to the Castle, and discover the new order reigning over her kingdom.
What could have pushed her out of her self-imposed exile?
The Monsters would be curious to find out, if something strange and threatening wasn't spreading amongst them.
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
02 Nov 2025
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It's been a few years since Monsters returned to the Surface and lots of things have changed... Accompany your favorite characters from Undertale, Undertale Yellow and Deltarune as they try to manage their everyday responsibilities and go through a few wacky adventures while at it in this slice-of-life crossover AU.
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开始于2018年12月30日，2025年8月10日正篇完结，手绘漫画，共829页，缓慢上传中。
“也许从我遇见你的那一刻开始，一切就注定再也无法回到原样了。”
sans，只是在snowdin一如既往地履行着哨兵的职责，却在ruins的入口附近偶然抓获了不知为何偷偷摸摸进入了undertale的ink！sans。在一番“友好交流”后，sans接受了ink的请求，前往他推荐的多元宇宙，并在那里遇到了一个会改变他一生的怪物——当然，对于那个怪物来说也是如此。 -
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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:
- 3
- Hits:
- 22
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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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The two hundred and ninety seventh copy of the Original variant, Undertale, started off much like its origin. Long ago, humans and monsters lived in harmony. Then, war tore the lands, and the humans were victorious, sealing the monsters underground with a magic spell. Only the power of seven human SOULs would shatter the barrier.
Time passed, seven humans fell, six SOULs gathered, and it was Fate that a child would determine Destiny through DETERMINATION. And so the story goes.
But no copy is perfect, least of all this one.
Aren't you…curious?
How did this world diverge?
What happened here?
Why was Fate woven so?
And…who, exactly, was Sans? Dust? Killer?
When did he change from one to another…? (Or maybe, just maybe, he was always himself.)
Or; look i was writing bad sanses + star sanses backstory fics i might as well make one for check as well
Series
- Part 3 of Checkverse
- Language:
- English
- Words:
- 1,017
- Chapters:
- 1/?
- Hits:
- 9
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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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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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Monsters have been freed from their prison underground. They are finally able to explore and enjoy the world that humans refused to let them live in. Everything is going great! Maybe some humans are bad and judgemental towards them, and maybe some of them throw horrible insults at them, and maybe some do... other stuff. Well, that's no problem for The Great Papyrus! He's a tough guy! Nothing can get through his sharp bones. Not even an unexpected meeting with a human, that leads them both to an alleway and... huh, Papyrus can't seem to remember what happened next. That can't be right! His memory is sharp and always relliable!
...
Why are his clothes on the floor tho...?
...
Oh god.------------------------
Papyrus meets a stranger that's going to change his life. Not for the better unfortunately. But he has a family that will always help him!
As long as Papyrus lets them.
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Where Do Monster Souls Go When They Die? by Just_AliAnne261
Fandoms: Undertale (Video Game)
01 Nov 2025
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"Papyrus felt... strange. Softer. Lighter than ever before.
He could've sworn he was just in his bedroom a minute ago. He remembered his old, cold bones curled up under the sheets, his soul crying out with deep, painful loneliness. He's pretty sure he just fell asleep in that bed with tears running down his face.
He's never been the same since Sans passed away two years ago.
But now he's on a fluffy white cloud, high in the sky. At least, that's where he thinks he is."
Series
- Part 12 of Skeletwins Side Stories
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Snowdin Adventures with the Skeletwins by Just_AliAnne261
Fandoms: Undertale (Video Game)
01 Nov 2025
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"You want to know what to do here in Snowdin? Grillby's has food, and the library has information... If you're tired, you can take a nap at the inn. It's right next door - my sister owns it.
"And if you're bored, you can sit outside and watch those wacky skeletons do their thing. There's two of them... Brothers, I think. They just showed up one day and... asserted themselves. The town has gotten a lot more interesting since then."
The daily lives of wacky skeleton brothers Sans and Papyrus. Watch and read as they get into all sorts of wacky adventures, cause mayhem, and learn life lessons along the way!
Series
- Part 1 of Skeletwins
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Made with Sunshine and Knots of Love by crispycreambacon
Fandoms: Undertale (Video Game)
01 Nov 2025
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Papyrus always yearned for a dress, but what kind of dress should she wear? A tiny friend of hers has a wonderful idea.
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lets make it quick
You're a mage, one of the 7 great mages. You and the 6 other mages helped your kind during the war, and you all won. You trapped the monster inside the mountain of E-bott. After the war, everything was perfect, peace everywhere, and the mages ruled the world. But something bad happened, and all of a sudden, you were the only one to survive; the other 6... they died, or at least 5 of them. One of them was never heard from again.Being immortal and being hated by your own kind, what a hellish life, isn't it?
Hiding away from society for decades, until finally, the time comes and you return to society to be a normal human being.
But you're not a normal human, so you need to change your appearance to look older and older over the years.
Then you fake your death
and change your appearance again to become yourself… then repeat.
You decide to open an orphanage to cure your loneliness, and it works! And then you start a business.
Over the years, you become one of the richest women in history.
Everything was perfect
and then fate seems to like you too much and starts saying, "Hey, let's break the barrier and give this mage some life!"good luck!
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You’re young. You marry the wrong man.
You wish you were dead.
Be careful what you wish for, Seven.
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Or, you find yourself Underground surrounded by starving, tortured monsters who know you're the last soul needed to attempt to break the barrier again. You said you wanted to die. Don't back down now.
Series
- Part 8 of How To Be A Human Being
- Part 9 of I/Me/Myself
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Shadows Cut From the Soul by CodePlanTB
Fandoms: Undertale (Video Game), Deltarune (Video Game)
30 Oct 2025
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A few days after the end of the pacifist route, Frisk finds themself facing an unknown threat lurking in the dark. Frisk needs to work with their friends and stop the threat before the whole underground becomes darker than dark.
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Bad time? I've had worse. by JohnFanFiction
Fandoms: Re:ゼロから始める異世界生活 | Re:Zero Starting Life in Another World (Anime), Undertale (Video Game)
30 Oct 2025
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Subaru Natsuki was raised in the underground, living a life of peace and joy with his two older skeleton brothers.
When that life is however destroyed by a demon child who he ends up killing, losing his life in the process.
What will he do?
He's in a new world of mana and politics. Will his blue magic be enough to help him survive, or will he have to call upon something else?
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In the brutal world of Underfell, everything runs on discipline — and no one enforces it harder than Papyrus. The Great and Terrible Papyrus lives by the schedule: training at dawn, patrols, order above all. But when his lazy brother dares to break the routine by getting sick, the iron commander of Snowdin finds himself waging a very different kind of battle.
As Sans coughs and cracks jokes from under his blankets, Papyrus’ sharp edges start to bend — just a little. Soup replaces training, orders soften into care, and the line between “boss” and “brother” blurs. For one rare, quiet day, Snowdin’s coldest house learns the warmth of something dangerously close to love.
A soft, domestic Underfell story about exhaustion, stubborn affection, and what happens when the scariest skeleton in the Underground learns to rest.
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frisk decides to do a pacifist run...
- Language:
- English
- Words:
- 158
- Chapters:
- 1/?
- Kudos:
- 3
- Hits:
- 40
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After Basil’s death, Sunny runs towards his home in an attempt to end it all, but Aubrey follows him and she prevents him from dying. Sunny tells her the truth and now they have to face it together.
After moving, they find themselves camping until something happens and now the two will travel together in order to escape the Underground filled with creatures that were only believable to see in fantasy books.Notes:
the Undertale tags are there because I want to make an Omori x Undertale fanfic, but there won't be anything related to Undertale during the first two chapters except for some references to Mt. Ebott and its legend, but around Chapter 3 or 4 onward, the Journey through the underground will begin!
So stay PATIENT!Series
- Part 1 of OMORITALE: Fallen Down (Fan-Series)