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After receiving an impossible project from the Royal Family, your scientific collaborator and partner, Dr. W. D. Gaster, has been obsessing over his work and running himself ragged. A particularly late night leads you to taking some initiative in the situation, and you end up staying the night with him, where both of you get some much-needed rest. The next morning, facing two entire days off from work, you two find ways to keep busy.
- Language:
- English
- Words:
- 4,092
- Chapters:
- 1/?
- Hits:
- 16
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A Jaded Emerald by KTamao205
Fandoms: Harry Potter - J. K. Rowling, Undertale (Video Game)
04 Sep 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 ArcalithTale
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Of Shadows and Hopes by Nadia_Sempai
Fandoms: Undertale (Video Game), Don't Starve (Video Game)
02 Sep 2025
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Finally finding an escape from the world of Don't Starve, Wilson finds himself in a world unfamilliar from the one he knew before.
He isn't alone, though, Frisk and the monsters he calls his family will be there.
Somehow... Wilson P. Higgsbury knows this won't be as easy as keeping himself alive in his old prison.
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Adults lied. It was what they did.
They said they would take care of you, but they didn’t. They said they would be there, but then they died. Sans had gotten used to it.
But Papyrus shouldn't have to.
And if Sans had to take matters into his own hands in order to make sure he kept his promise to his little brother? Then so be it. It was Sans and Papyrus against the world, and some gangly skeleton with gentle sockets and a weird font wasn’t going to be the one to change that.
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“Sans, wait—! Please, let’s just talk for a moment—!”
“no way, you creep! leave me alone!”
“Excuse me? I’m not a creep! I just wish to talk! You have many people very worried about you—”
“nah, you’re not excused. gimme 500 g and then i’ll consider it.”
Series
- Part 3 of Finding Home
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My hummingbird (W.D.Gaster/Reader) by OMGwhyamIadegenerate
Fandoms: Undertale (Video Game)
27 Aug 2025
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"Ladies and gentlemen, please welcome our queen of the opera, Y/N!"
The noise, the magic, everything making your heart fill with emotion and your body shake with excitement. This is your life.
About 10 years ago, the monsters from the Underground were freed. Unfortunately, the hope of pace was quickly buried under the shadows of the mafia. The human mafia king and the monster mafia king, king Asgore, formed an alliance, covering the shadows with eyes, ears, and fear.
You are a 28 years old opera singer, the best at your job. This is your dream and love, music. Since a child, you fought your way up, alone. But one night, you feel another type of magic, one you never felt before. Your new bodyguards, the skeleton family, intrigued you with their mystery, especially the man named Gaster.
This time, you won't sing a story nor play a role, this time, you would truly feel the power of the most dangerous magic, love. -
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Gaster wants answers to his questions, regardless of the universe he’s in. (Even if he inadvertently caused those questions himself, intentionally or unintentionally…)
He’s been alone as long as he remembers and the only thing that could be a “clue” to his identity and hidden memories is a metal plate drilled into his right hand.
Or Gaster tries to find answers but everything goes worse for him.
Handplates! AU (reversal of roles)
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Where is my "how to raise a babybone for dummies" book again ? [REWRITTEN] by NtBob
Fandoms: Undertale (Video Game)
11 Aug 2025
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It was cold, so cold, too cold.
You were draining, slowly, as an orange whose juice would be taken....
the warm juice, the warm and red juice. Leaking, through a dam's rift.
You felt like an empty Shell, empty of what it contained, empty, too empty.
You couldn't see anymore, couldn't hear anymore, couldn't feel anymore.
You were surrounded by emptiness. An emptiness that took everything, and nothing at once. Then, Came the light.
and you were no longer… empty.
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Or when a reader who got no memory except for Undertale and common sense, wakes up as the most mysterious skeleton of the bunch ; W.D. Gaster
It's way before Frisk fell underground, but after the Asriel/Chara incident.
(ALSO REWRITTEN FIC, I released it back in 2019, then deleted my account, all fanfics with it, decided TO WRITE THEM BACK CAUSE I LOVED THEM)
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The Dark World is alive, and dangerous. Luckily for people like Susie or Ralsei, the effects of exposure don't affect those made of magic, whollely or partial so. Unluckily, Kris isn't at all. Even more unluckily, nobody but Kris (And some silent partners) knows this. And that infection would sooner kill them both than let Kris mention this.
Between a sapient infection, and the repressed memories it keeps bringing up, Kris isn't having a good time.
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⚠️THIS TAKES PLACE AFTER THE EVENTS OF CHAPTER FOUR, READ AT YOUR OWN RISK!!⚠️
__________________________________________So like, Pretty much Kris throws you under their pillow and sneeks out the house to hang out with their friends. They left their phone in their room and GASTER STARTS CALLING THE PHONE?! Whats gonna happen next….? 😇
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Kris and Susie have finally found the last codes to the shelter, but as they enter, they realize that this isn't a normal Dark World. The farther they explore, the quicker they realize that they need to hurry up and find the fountain, before something else finds them.
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Gaster is searching for a vessel to complete his experiment. He meets baby Kris and offers them a better life.
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nagito komanda i mean the egg and the carrot by orphan_account
Fandoms: Cookie Run (Video Game), ironi aleph
28 Jun 2025
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Two boys fall in love under the stars and get freaky in a school bathroom (Nagito Komeda), hi, I'm Nagito Komeda
teo: i never imagined id fall in love with him, but now, HES MY EGG. MINE *growls*
alon: AHHHHHH IS THAT NAGITO KOMEDA??? also I LOVE to he's my tall ass carrot * crashes car*
nagito: hope- Language:
- עברית
- Words:
- 103
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 32
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Como científico real, Gaster debe ver siempre por el funcionamiento de todo pero eso ha llegado a costarle mucho más de lo que imagina, y por eso mismo el rey debe encargarse de él, pero ¿hasta que punto? ¿Cruzarán la linea más allá de la amistad?
[Posible edit de summary]
Ahora, con el paso del tiempo, este "pequeño" Kingdings ha pasado casi a ser un AU alternativo, si aún decides seguir leyendo y averiguar que ha ido pasando por mi cabeza, eres bienvenido, sino, eres libre de dejarme pasar de largo y gracias por leerme hasta donde llegaras. -
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Welcome to DELTARUIN, a fantastical world of light and dark
Of hopes and dreams
Your choices affect the people around you, you can save lives or take them
A terrible secret lies within these dark worlds, a tale of murder and betrayal and people falling apart at the seams
You can either save them or put them out of their misery..
So..
YOU ACCEPT EVERYTHING THAT'S GOING TO HAPPEN FROM NOW ON? -
Welcome To The Underground (Season 1) by MyLoveForYourFantasy
Fandoms: Undertale (Video Game), Glitchtale Rewrite
05 Jun 2025
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Hello 👋🏼, & Happy Wednesday Afternoon Everyone, This is gonna be a "Glitchtale Rewrite", with HUGE differences.
This is also heavily inspired by "What is Left Behind" By EmmaSmoke:
https://archive.transformativeworks.org/works/54889081/chapters/139135684&
"Undertale Sevenfold" By Rotengen:
https://archiveofourown.org/series/4149664Series
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[ABANDONED] Memories from the void by writer404
Fandoms: Deltarune (Video Game), Undertale (Video Game), and a assortment of random fandoms cause i said so, but they are mostly just mentions
05 Jun 2025
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This story has been dropped sorry yall
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Deltarune by W. D. Gaster (and Dess Holiday) by DreamyWoolenDaze
Fandoms: Deltarune (Video Game)
02 Jun 2025
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There were multiple times in her life Dess could say she had really had it up to there with her mom and needed space from her.
Only once did it go too far.
In her anger she ran off in the middle of the night with nothing but the bag on her back, her beloved whiffle bat and a bag of Lightly Salted Hays Chips ™ (The only junk food her mother would allow in the house) in hopes that the fresh air would help clear her head.
Nowhere should have been more private than an unused weather bunker..
Is what she thought until she stepped inside and amongst the scattered papers and fast food wrappers was a strange man seated in front of the glow of a computer screen
Oh and his weird human roommate too
Series
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[Honestly..
After everything you've been through you didn't expect to find yourself here, in the middle of a fight between two men you recognized too much to be normal, with your unconscious husband in your arms having a near death grip on both newborns while you could at least stand without feeling your legs numb.
You lost hope of being able to hide when both turned to look at you and your dear still sleep in your arms, whom you quickly hid from sight with your cloak, covering him as much as you could.
"Fuck.."]
Or; After years of being responsible for making the impossible possible in a crumbling world, your people receives an unexpected but not less welcome peace. You don't plan on freeing your claws from this chance.
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Sans mistakes an orange glow in the forest for a human soul...
Shenanigans ensue; pun are learned... so many puns...This is just a collection of Grillby and Sans being friends as kids and staying friends as they grow.
Grillby and Gaster do mostly talk in sign language, but I don't know sign language myself so I may include words that do not exist in sign language, but I am trying my best. Stuff said in sign language will be in italics because I find it a bit easier myself.
More tags may or may not be added. -
UNDEREVENT 2025/The Final UNDEREVENT (alternative) by SplatoonMangaFan
Fandoms: Undertale (Video Game), Deltarune (Video Game), Undertale Yellow (Video Game)
24 May 2025
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An alternate take of UNDEREVENT 2025/The Final UNDEREVENT presentation (applications confirmed to open up around December 2025, and the UE Finale to release around December 2026).
I have no association towards UNDEREVENT Official, nor anything of Toby Fox's work.