1 - 20 of 22,867 Works in Papyrus (Undertale)
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Around 15 years before the events of Undertale, the sixth human soul fell down to the underground; seemingly shaken and troubled a younger Toriel takes them into her loving care. However everyone knows teenagers cannot stay put for long.
A 16 year old human who suffered a troubled life on the surface and hiked up the famous mountain for some ‘not so happy reasons’, who bared the strong and stiff-willed soul of justice tries to make their way through the underground and back out home, after a certain teenaged skeleton makes them realise that maybe they do have more to live for than they originally thought.
- Language:
- English
- Words:
- 502
- Chapters:
- 1/?
- Hits:
- 0
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The power of Determination is a strength that humans have in spades. It's what let you journey through the Underground, it's what kept you going in spite of it all. It's what drove you to try and SAVE Asriel... by any and all means. But what happens when that Determination falters? What happens when Determination rots under the weight of what you've done? What happens when you lose the will to keep going?
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Things have been fixed for over a year.
The nature of their world is known.
Everyone is happy. Everyone here is happy.Someone, somewhere else, is suffering.
Toriel begins Sleepwalking.
A sequel to Outside the Picture Frame. Several characters general state of being and demeanor will not make sense without context from the previous fic. It's gonna get meta and weird.
Series
- Part 4 of Guilty Soul
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Someone Really Cares About You. by Meowzerz_Oh_6
Fandoms: Undertale (Video Game), Deltarune (Video Game)
07 Aug 2025
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Sans Undertale struggles to adapt and move on while integrating on the surface.
The troubles of his past haunt him, the burden of his old home, coming from a different world, being aware of resets, the trauma is all messing with his head.
He’s already fallen into depression and other darker thoughts.
Will he succumb into hopelessness, or will he realize that people care about him in time?
OR
What if Sans Undertale is actually from Deltarune? What will a man with such knowledge and burdens do? Will he stay determined? Or will he succumb into the despair that the universe threw one thing after another at him, as he tries to move on in a permanent happy ending.
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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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A strange infection has broken out across the Underground.
Echo flowers have become strangely hostile and aggressive, attacking and infecting monsters and taking over their bodies.
Most of the Underground has become completely overgrown by these dangerous plants, and only a few safe zones remain.
Sans, the Royal Scientist, must figure out a cure with the help of his assistant Alphys, before everyone he loves becomes infected by the echo flowers.
When a human falls into the Underground, Sans must figure out if they're the key to saving everyone, or the harbinger of doom for his friends and family. -
Undertale/Deltarune Headcanons by Nightshade_The_Tabaxi
Fandoms: Undertale (Video Game), Deltarune (Video Game)
07 Aug 2025
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Don't bear the weight of the world alone by SkyWatcher3
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
07 Aug 2025
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After her fight with Clover in New Home, Ceroba, in the middle of rethinking her entire life, chooses to save one child's life, and the consequences of her decision changes the fate of the entire Underground forever.
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Calcination Syndrome by Fells_Kitten (SquirrleyCow)
Fandoms: Undertale (Video Game), Underfell - Fandom
07 Aug 2025
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Calcination: The process of heating a substance just below melting point to induce change in physical and chemical properties, to remove impurities and ensure specific reactions and outcomes...
Grillby has a perfectly normal attraction to his long-time friend and nightly regular at his bar, Sans. He's been dying for a chance to act on that attraction but keeps backing-out before he can follow-through. After patiently biding his time for the perfect moment he finally makes his move.
Sans is contently unattached to anyone romantically. He has his friends, he has his brother, he has the bar and Grillby's usually quiet but comforting company. What more could he need? He hasn't considered a life outside of living with his brother and the occasional random hook-up to blow off steam. Sure, he's noticed Grillby, he's not blind after all. But from the outside looking in, it's always felt like Grillby was just as happy being single as Sans is. Being a single dad, even with a grown kid, probably changes your standards for a partner anyway. Well, until Grillby kidnaps him that is.
Waking up chained to a bed kind of changes your perception of a guy.
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One day, our main character decides to open up Undertale before going out with some friends, he leaves the game on when he leaves, and when he returns, he finds the game with completely new dialogue, but as he finishes reading it, he slowly falls unconscious until he wakes up in the world of the game he loved.
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Twin Runes by Thealmoghtbeyonder2099
Fandoms: Undertale (Video Game), Deltarune (Video Game)
07 Aug 2025
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Twin Runes es un AU cómico en su mayoritariamente alegre centrado en los universos Deltarune y Undertale. Una fuerza desconocida ha provocado que aparezca un punto de conexión entre los dos universos, lo que hace que Frisk y la molestia fantasmal Chara tropiecen en la vida de Kris en uno de sus muchos reinicios (para gran disgusto de Kris). Se produce un caos que rompe el juego.
La traducciones del "los pájaros y abejas" hasta el "No sirve pa' nada" no son mías. Del resto de traducciones si son de mi autoría
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Horror reaches the surface. Unfortunately, this doesn't come without strings. And annoying ass people.
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It isn’t fair. You just wanted to be left alone…
Isn’t this what you deserve though? You broke the rules, everyone was perfectly upfront with you on what the conditions for being allowed to live were. It’s the right thing to do, what’s one more time?
Maybe they’ll forgive you if you let them… maybe they’ll forgive you.
You look up at the expressions on the monsters’ faces and you know in your heart that this isn’t going to stop.
Series
- Part 4 of The Power To Reshape The World
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Angel Pranks Skeleton (Gone Wrong) (Gone Sexual) by 2BearCubsInASnowstorm for Myself
Fandoms: Undertale (Video Game)
06 Aug 2025
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Eli decided that messing with a puzzle Papyrus made as a joke. Unfortunately, they have terrible memory, and fucking forgot. And since Sans decides the shapeshifter needs to get over the spite they have for his brother, they might as well get comfortable with him.
Maybe a little more comfortable than Sans wants.
Papyrus didn’t expect this. He wanted to get closer with them, sure, but this was ridiculous. He could easily pry the box open, but he might never get a chance like this again. So maybe he can make the most out of being trapped in here. They have plenty of time to get comfortable.
Maybe comfortable enough for Eli to fall for him.
- Language:
- English
- Words:
- 962
- Chapters:
- 1/1
- Hits:
- 11
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you would describe yourself as a simple person. you love cats, listening to music, baking, and painting. you're financially doing well and have loving friends and families who support you.
if you were just a simple person then why did you catch the attention of so many skeletons?!
various!sans aus X fem!reader
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Frisk's spaceship crashed into an unknown planet, having only a few injuries and a broken oxygen tank that they were handed they move forward (they can breath on the planet yes, explanation will be in the first chapter, they dont use the oxygen tank)—ready for whatever this planet threw at them.
This is an Outertale inspired AU, enjoy!!
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Sans wakes up with a splitting headache and no idea why there's a new crack on their skull. As it turns out, that was actually the least of his worries, because when he meets a more deadly version of himself, he suddenly realizes he may not be in Kansas anymore...
Series
- Part 1 of Graceful Mistakes
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Following the War of Humans and Monsters, both belligerents agreed that a second war would be too devastating, instead opting to coexist peacefully.
Centuries later, tensions run high, and the two kingdoms are on the brink of war once more. The unlikely duo of Frisk and Chara, heirs to the throne of the Human and Monster Kingdoms respectively, must learn to set aside their differences and cooperate to prevent another calamitous war, lest they face total annihilation.
And try not to kill each other, of course.
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“The hell are you doing?”
“Getting coffee,” they answer airily.
“Frisk. It’s the end of the world, and you’re ordering a coffee.” -
Undertale and Friendship is magic by Grillbyfan1
Fandoms: My Little Pony Generation 4: Friendship Is Magic (Cartoon 2010), Undertale (Video Game)
06 Aug 2025
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Tori meets the ponies
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A Jaded Emerald by KTamao205
Fandoms: Harry Potter - J. K. Rowling, Undertale (Video Game)
06 Aug 2025
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After dying young in the human world, Harry Potter reborn as a skeleton monster, is found and raised by Sans and Papyrus. As resets begin and memories fracture, the small family clings to each other through nightmares, and the haunting fear of loss. Amid magic, love, and terrible puns, the little brother becomes the heart holding them all together in a world that refuses to stay still.
Series
- Part 1 of GemTale