1 - 20 of 64,139 Works in Undertale (Video Game)
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The barrier is broken and, for most, clearer days draw near.
Alphys, however, has a sneaking feeling that something is wrong.
Series
- Part 2 of Wingdings Paradox
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Friend For Every Season by TheEvilInThisChild666
Fandoms: Chainsaw Man (Manga), Undertale (Video Game)
20 Jun 2026
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Summary
Himeno helps out her friend Toriel.
- Language:
- English
- Words:
- 528
- Chapters:
- 1/3
- Hits:
- 0
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The Path Less Travelled by TGClmao
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
20 Jun 2026
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Summary
"Two roads diverged in a wood, and I - I took the one less travelled by, and that has made all the difference." ~Robert Frost
Someone familiar falls into a world that is not their own, as the story always goes. Another's path of vengeance left it bitter and broken in ways unknowable, leaving the next to pick up the pieces.
Will they manage with the cards stacked against them, in a world with no real escape?
Only time will tell.
(Though, maybe not. They're pretty tired, and the ghost in their head isn't exactly helping.)
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Unwelcome and Infested by AlexisMint
Fandoms: Deltarune (Video Game), Undertale (Video Game)
20 Jun 2026
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Summary
Only few years passed after the great war between monsters and humans. Everyone was still on edge. Wandering in the forest Toriel found something interesting, someone, a human named Kris. If only she knew how bad the rest would turn out for her and everyone in the hometown...
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- Language:
- Українська
- Words:
- 504
- Chapters:
- 1/1
- Collections:
- 1
- Hits:
- 1
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The Moon To My Sun [The Eclipse You And I Are.] by Lunar_EclipseCosmosss
Fandoms: Undertale (Video Game)
20 Jun 2026
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Summary
Dream breathed, “You’re not going to win this,”
“I know.” Killer stepped back as his wrist was caught, held in the air as he tightened his grip around the knife.
Dream hummed in puzzlement.
“Then why try?” He asked, craning his head to the side as Killer attempted to push himself away from Dream’s relentless grip, failing as he did so.
Unexpectedly, Killer moved forward, until their bodies were almost touching each other. He leaned his head towards Dream’s ear.
“Because it’s addicting.”
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OR: Found family Bad Sanses trope, but throw in Dream. -
Olive fracturetale: olive green means mercy by IlarySan13
Fandoms: Undertale (Video Game)
20 Jun 2026
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Summary
Two days after Frisk's fall, another human crosses the barrier and arrives in the Underground.
Their name is Alay, and their soul isn't red like Determination... but olive green, a strange color that represents mercy.
Toriel greets them tenderly, Frisk observes them silently, and Flowey smiles maliciously.
Everything seems to be following the same path as always, but something changes: the Underground no longer has just one human... now there are two.In a world where every decision carries weight, how far can mercy take you?... After all, mercy has two interpretations.
And Frisk knows they messed up.
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Un Ruso En Isekai De Videojuegos by ElGueroAlmasZ
Fandoms: Mortal Kombat - All Media Types, Clair Obscur: Expedition 33 (Video Game), Wiedźmin | The Witcher - All Media Types, Metroid Series, Overwatch (Video Game), Stellar Blade (Video Game), Street Fighter, Mirror's Edge (Video Game), Elden Ring (Video Game), Bayonetta (Video Games), Perfect Dark, Tomb Raider & Related Fandoms, World of Warcraft, Red Dead Redemption (Video Games), Undertale (Video Game), Original Work, Kingdom Hearts (Video Games), Pocket Monsters | Pokemon - All Media Types, Fire Emblem Series, Halo (Video Games) & Related Fandoms, Gears of War (Video Games), Rise of Nations (Video Games), Age of Empires (Video Games), 崩坏：星穹铁道 | Honkai: Star Rail (Video Game), Final Fantasy Series, Compilation of Final Fantasy VII, Final Fantasy XIII Series (Video Games), Sonic the Hedgehog - All Media Types, Super Smash Brothers, Devil May Cry (Gameverse)
20 Jun 2026
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Summary
Tras vivir sus 25 años sin hacer muchas cosas importantes, un ruso amante de los vídeo juegos y la cerveza termina siendo trasportado a un universo distinto donde los personajes de sus amados vídeo juegos están, pero el secreto es mas oscuro de lo que parece.
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Olive Fracturetale: Verde Olivo Significa Misericordia by IlarySan13
Fandoms: Undertale (Video Game)
20 Jun 2026
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Summary
Dos días después de la caída de Frisk, otro humano atraviesa la barrera y llega al subsuelo.
Su nombre es Alay, y su alma no es roja como la Determinación... sino verde olivo, un color extraño que representa la misericordia.Toriel lo recibe con ternura, Frisk lo observa en silencio, y Flowey sonríe con malicia.
Todo parece seguir el mismo destino de siempre, pero algo cambia: el subsuelo ya no tiene un solo humano... ahora son dos.En un mundo donde cada decisión pesa, ¿hasta dónde puede llevar la misericordia?... Después de todo la misericordia tiene dos formas de interpretarse.
Y Frisk sabe que metió la pata.
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IM NOT YOURS! by Missh3h3
Fandoms: Undertale (Video Game), Fellswap - alternate universe, Underfell - Alternate Universe, Underswap - Alternate Universe
20 Jun 2026
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Summary
Y/N is a gamer girl who is doing a walkthrough of a game for her viewers.
And one day, a game booms and goes viral. So her loyal and lovely viewers beg her to play them and to make her lovely viewers happy. She bought the game.It costs a lot for a dating sim, if she may say.
but unbet she knows. That's game are going to drag her to hell.
or
The Mc is trapped on this dating game, and she needs help to survive!
Would you be willing to make a decision for her?
dear reader? -
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Summary
Dust has never had an easy life. But when Papyrus, the one thing that was good in his life, died things only ever seemed to get worse. After his mother decided to move away from the house that only brought bad memories, Dust has to get used to a new school. He quickly finds himself drowning under the pressure of bullies and his home life but maybe…amidst this suffocating sea, he can find friends to help him through this.
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Summary
This is the sequel of my work "How you SAVED me", so there're spoilers ahead for that work!
"Our final travel through the Underground was the best thing I've ever experienced. You were so relieved, so euphoric and excited. And there were so many funny, heartwarming and instructive moments that it's definitely enough for an entire new story."
Having received forgiveness for their previous genocide, Frisk has just reset the timeline once more (see the end of part 1!) Now, Frisk and Chara are on a mission to save no less than every monster, flower and other living being in the Underground. And they have collected all the necessary knowledge for that during the previous timelines. However, that still does not mean that things are always going to be easy.
Series
- Part 2 of How you SAVED everyone
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kissing and hope they caught us (I wanna show you off) by Fishie16 for Meowserling
Fandoms: Undertale (Video Game)
20 Jun 2026
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Summary
There is a price that comes with immortality.
A sense of age that'll never truly come; a lingering knowledge that those you may possibly have affection for will soon melt away at their skin and will become no more–nothing more than a memory that you may eventually forget, clouded over with someone else–someone else who is entirely as temporary as them.
It had only been recently that he learned a new kind of pleasure–one he had always known of course, but never one he himself had thought to indulge in. It felt too intimate. Too standard; too positive.
Or;
Nightmare has three bad (crazy) bitches in his castle. How could he NOT fuck them?
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Coming Home to You by c00lsk3l3t0n95
Fandoms: Undertale (Video Game), Deltarune (Video Game)
20 Jun 2026
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Summary
Waking up in a brand new home, Tenna truly couldn’t ask for more. Well. Maybe just a teensy bit more. He just wants to be with his new Lightners. By Lightners, he means Lightner. By Lightner, he means Papyrus.
But, is there more to his new companion than meets the eye?
Series
- Part 3 of Papyrus
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Summary
When the human mages first sealed the monsters underground, they accidentally created an all-seeing entity that watches over monster-kind. When the CORE explodes, this entity is given a conscience; and when Frisk falls down, the entity watches their journey to learn morality from them.
When the Barrier breaks, everyone is freed, including the entity— or as many monsters start calling her, “the Angel”— of the old prophecy, having mistaken Frisk for being that messiah. That entity is, in fact, you— the Reader.
And Sans has always been a skeptic when it came to the religious hopes of his people.
TL;DR - Reader is the collective force of all monsterkind’s wishes to/for an Angel from prophecy, made flesh. Sans, being a scientist, doesn’t know what to make of this.
This is my first fic posting on A03, but not the first fic I’ve ever written. Please keep that in mind, and thanks for checking my story out!
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Summary
Killer wakes up mid day to find that he is now sharing his body with nightmare god of negativity. Nightmare doesn't understand modern technology and is constantly confused by many things
(If you're here for the religious trauma and stuff please be patient as I'm still getting to it in the story)
I am going to go batshit insane with this fucking fic and YOU ARE GOING TO LIKE IT -
I Dream of a Dark World by PARAK33T (parak33t)
Fandoms: Deltarune (Video Game), Undertale (Video Game)
20 Jun 2026
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Summary
Chris Dreamer is a troubled teen in a troubled family. After climbing Mt. Ebott, they stumble upon(falling and breaking their leg) the old Ruins of a civilization of a race now extinct. After making contact with a strange symbol on the wall, they become plagued with dreams and nightmares of a world similar to their own, but different in every way.
- Language:
- English
- Words:
- 1,234
- Chapters:
- 1/9
- Kudos:
- 1
- Hits:
- 8
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Summary
Just an ordinary trip to the underground.
Oh yeah! And Frisk has the ghosts of all of the past humans in their head! What could possibly go wrong!
Frisk and the humans adventure around the underground, and help to tie loose ends and help each other with their problems.
Series
- Part 1 of Undertale: Sevenfold
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Reigen Arataka Becomes Roommates With Sans and Kaname Madoka by MIKEYXD
Fandoms: モブサイコ100 | Mob Psycho 100, Undertale (Video Game), Mahou Shoujo Madoka Magika | Puella Magi Madoka Magica, OMORI (Video Game), Dangan Ronpa Series, 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Manga), 光が死んだ夏 | Hikaru ga Shinda Natsu | The Summer Hikaru Died (Anime), Persona 3, Persona 5
20 Jun 2026
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Summary
It was cold and wet when he first walked into the room. The floor was too creaky, the air was humid, and the walls looked like something from a grandma’s spare room. But not in a good way. Reigen Arataka was NOT going to like this. Ever since Mob had stopped working, work has been declining. Even Serizawa left. Not because he wanted to, but because his mother was sick, and he wanted to be there for her. Reigen had told him to go visit him because it was apart of his policy!! Maybe that wasn’t such a great idea… Reigen got kicked out of his apartment because someone bought the whole dang building… It’s fine though, REIGEN ARATAKA SHALL MAKE DO BY HIMSELF!! Reigen decided to grab the biggest room, because he bought the place after all! The apartment was DIRT CHEAP! Maybe that was why the place stunk… No matter! The great Reigen Arataka shall-
“Yoooooooo, this place sucksss.”Reigen has fallen off without the help of Serizawa and Mob. So he decides to sign a contract to rent out an apartment. Though, what wasn’t on the contract was that he had to share his room with two other people! What will he do….
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endlessly painstaking and insulting new show. by NeverShrek1ForSomeReason
Fandoms: Roblox (Video Game), キルミーベイベー | Baby Please Kill Me, Fundamental Paper Education (Web Series), Henry Stickmin Series (Video Games), Five Nights at Wario's (Video Games), Cryptoland, Five Nights at Freddy's, Happy Tree Friends, Murder Drones (Web Series), Undertale Yellow (Master Sword Video Game), The Fancy Pants Adventures (Video Games), Undertale (Video Game), Spooky's Jump Scare Mansion, Miitopia (Video Game), Everhood (Video Game), Creepypasta - Fandom, Bug Buddies (Webcomic), OMORI (Video Game), Doki Doki Literature Club! (Visual Novel), Merryweather Media, Baldi's Basics (Video Games), The Amazing Digital Circus (Web Series), Ramshackle (Web Series), Kirby (Video Games), Super Mario & Related Fandoms, Five Nights At Treasure Island (Video Games), Toy Story (Movies), Console Girls (Web Series)
20 Jun 2026
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Summary
pains.
they will never end.Series
- Part 1 of it hurts real bad.