1 - 20 of 166 Works in Underfell Papyrus/Underfell Sans (Undertale)
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Okay, so admittedly none of this has gone entirely according to plan.
Actually, most of it did the opposite of that.
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OR:
Sans runs afoul of some pirates once or twice, and it turns out there are a lot of things he doesn't know about the universe at large - things he really wasn't ever supposed to learn.
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Traveling counterfeiter Red chooses to sell in the wrong area. Meanwhile Edge might just find a new "recruit" to welcome into the family, weather the other wants it or not.
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Don't Care if it's Wrong or Right by Kamari333 for nilchance
Fandoms: Undertale (Video Game)
17 Aug 2025
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The Fallout of Slinky's Brother coming to the house that Red tries to keep as quiet as possible.
Series
- Part 7 of ain't this a lamia
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Big prompts, small prompts, fluffy prompts, randy prompts--For the low low price of 0 G, you can take home as many as ALL of these prompts!
(Just a collection of my silly thoughts/imagines/prompts/almost-drabbles involving skeleton brothers that might otherwise be lost with the shadowbans or the sinking ships that are social media platforms.)
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It's been four months since the whole world tilted and spun out under Sans, dropping him into the snow in front of a very tall skeleton.
Four months, as it turns out, is a very long time.
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- Part 2 of no way off the hamster wheel
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Papyrus is making cookies. Sans is in the way, a lot.
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Mayday? More like MayDaddyPutSomeBabiesInMePlease by Sin_Cognito
Fandoms: Undertale (Video Game)
31 Mar 2025
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Edge and Red have reached a point in their lives as a couple where they want to start a family. Unfortunately for them, they're having a hard time conceiving. Fortunately for them, Red is undergoing a treatment to make him more fertile. Unfortunately for them, the treatment comes with... peculiar side effects. No bad per say, but definitely not appropriate for their current situation.
Stuck in a plane for another 5 hours, whatever shall they do~?
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Deep in the forest, there are stories of a monster that lives by a lake. Snake-like and aggressive it will attack all that dare step on it's land. Many are warned to take a detour and avoid going towards the lake, where it is assumed it resides.
But FUCK that noise! Red has places to be! He doesn't have time for tall tales and surely no lamia creature exists! No sir, he's in the process of moving and the forest is a quick shortcut to the next town. Absolutely nothing bad can happen!
....Surely, right?
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Red's LV spikes have become something of a problem. Edge decides to take charge of the situation.
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Edge is always having to put on a tough face. He has to in this cruel world. However when he's finally home, he's more then willing to let someone else make choices for him.
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A continuation of nilchance's "no dawn, no day" ATTL AU. Please read the tags, as this story will contain many elements that may be triggering or traumatic to some.
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Sadly I'm not in the Undertale fandom anymore so I don't have any intention to finish these, but I did really like some of them so I thought I'd post them anyway. They are all unfinished so they don't have actual endings. If they inspire you feel free to finish or rewrite them yourself as long as you credit me!
It's mostly Sanscest. There's two that are Fellcest but one's a crack fic lol.
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RED-y for some lovin'? (canceled) by Niya_Wonderland
Fandoms: Undertale (Video Game), Underfell - Fandom, underswap
07 Feb 2024
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Swap, Fell, and Tale all have a relationship together. Everyone had sex with everyone....well at least everyone, Red never done the do with any of the lovers. Blue brought this to the attention of everyone, all filled with lust and rage they draw straws to see who will take Reds virginity.
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when under stress from moving, drink your sorrows away!
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Blue and Stretch are falling apart until they end up in Underfell. Sometimes something unexpected can bring people together.
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- Part 1 of Underswap #832
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The Only Things in Danger Here Are Our Pants by GetMcDunkedOn for Sin_Cognito
Fandoms: Undertale (Video Game)
21 Apr 2023
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Stretch thinks Underfell is too dangerous for Blue. Blue proves him wrong... and gets greatly rewarded for it~ Meanwhile, Edge learns a few things and decides he's VERY cool with it. Red reaps the rewards from both parts of this.
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Papyrus knows better to leave things be
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Every year, the villagers choose a living sacrifice for the God of the mountain to devour. This year's sacrifice is Red, but the skeleton won't go down so easily. An unexpected meeting might derail his plans...
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Sans wants to try a few new things. Papyrus really can't understand why.
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Los reyes de Fell y Dreemurr han organizado una reunión en el reino del primero, con objetivo de llegar a acuerdos que beneficiaran a ambos pueblos. Fue en esta situación política que Red Blakemore y Sans Wingdings se conocieron, como las respectivas reinas de sus hermanos menores. Descubrirán que no son tan diferentes como parece a primera vista y que, tal vez, acaban de encontrar al ser que mejor los puede comprender.
Una simple coincidencia que junta a estos dos esqueletos en su papel de reinas.Sans!UTxSans!UF / ClassicFell/ Kustard
Fontcest