1 - 20 of 461 Works in Scientist W. D. Gaster
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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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You were a normal human. You went to college, you had a life, friends, family, etc. Apparently, the void didn’t care much for happy endings, and you find yourself strapped to a table in an underground lab.
It’s fine, you have plot armor.
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Or, you get sucked into the void and your soul is placed in the body of eight-year-old Sans.
Arc 1: Heritage (1-7)
Arc 2: Hell (8-10)
Arc 3: Home (11-45)
Arc 4: Heart (46-59)
Arc 5: Hostage (60-?)Series
- Part 1 of How To Be A Human Being
- Part 1 of Hounds Of Love
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The Shadow in the Knight’s Hand by Metal_Overlord93
Fandoms: Undertale (Video Game), Deltarune (Video Game)
06 Sep 2025
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In the quiet town of Hometown, everything seems peaceful… or so it appears.
Kris Dreemurr, a lonely teenager haunted by a past tragedy, struggles to find their place. With their brother, Asriel away at college and their best friend Noelle growing distant, Kris feels more isolated than ever. But along the way, they form new friendships, and slowly begin to reconnect with Noelle.
Meanwhile, whispers spread of a mysterious figure appearing around town, a cat-like shape with haunting pink and yellow eyes. Some say it appeared after the disappearance of December “Dess” Holiday.
Now, with strange “Dark Fountains” opening across the land, Kris and their friends must uncover the truth behind Dess’s vanishing and confront the darkness threatening to consume their world.
Series
- Part 1 of UT/DR stuff
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After falling into the Underground, you find that you don't have what it takes to break the barrier. You and everyone else are thoroughly disappointed. Things are rough at first, but you slowly adjust and accept that your new life will be among Monster-folk. You work through your trials and tribulations in the Underground, make new friends, even land yourself a job, and... fall in love with a certain skeleton? How charming.
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Sorry for the really vague description, this is my first fanfic 3
So.. I hope it's bearable and that maybe someone will enjoy it ! -
The Games We Play by FoundUser, Primordial_Rebel_Jester
Fandoms: Deltarune (Video Game), Undertale (Video Game)
02 Sep 2025
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There are infinite opportunities in this world. Infinite opportunities for dreams. Infinite opportunities for hopes. Infinite opportunities for regrets... for loss.
There are some memories you would rather just forget...
The old royal scientist knew that better than anyone.
BRIGHT, BRIGHTER, YET BRIGHTER. SO YOU STILL SHINE ON, EVEN AFTER EVERYTHING YOU ENDURED. EVEN THROUGH THE COLDEST NIGHT.
But a story doesn't have to end the same way.
EXCELLENT. TRULY, EXCELLENT. LET US BEGIN THE CREATION OF OUR NEW FUTURE.
Sometimes... a game can have a secret ending.
(A Deltarune novelization that takes some unexpected turns from canon. Based on some theories, and a little bit of imagination, even the unknown can make itself known.)
(Custom Art and beta'd by Primordial_Rebel_Jester. Story by FoundUser.)
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Long ago, two races ruled over Earth: Humans and Monsters. Religion and fear of differences troubled the fragile peace on which both species were living so far. A war for faith and honor soon engaged between them. Long. Endless.
Sans and Papyrus, two young skeletons brothers, sons of the Royal Scientist, lost everything in the rage of the fighting: their home, their family, their childhood. During a human attack, they suddenly found themselves delivered to bullets and bombs, all alone.
Both of them started a journey in the devastated landscapes of the end of the war to join Mont Ebott, where Monsters are preparing for a last battle. But could two kids survive by themselves in the wild and without any help?
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What happened to December Holiday? 15 year old deer-girl, brunette, short wavy hair, usually wears a red jacket, went missing in 2012.
This fanfic (for now) will tell the events that previously happened before she got lost in Angel knows where.(Mainly a DESSRIEL fic but I'd like to focus on other characters and make a more profound plot as well :pppp )
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When you find yourself somehow having traveled to the world of undertale how do you handle all the hot skeletons?
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Just when he's lost everything, Spamton G. Spamton is approached by a stranger in a dark suit. They offer him a deal: spy on the Knight, and he'll want for nothing. The answer is obvious. However, once that can of worms has been opened, there's nothing Spamton can do to stop the chaos that follows.
This is a Spamtenna novel that follows the series of events occuring before the main gameplay in Deltarune, focusing on who W.D Gaster is and Dess's motivations as the Knight. Tenna and Spamton are both bound by contracts to serve as their proxies, but what happens when their relationship causes them to violate their deals?
(Description subject to change)
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A creative slump sends you searching for inspiration in the wilderness, but one misstep lands you under a mountain instead of on top of it. As you navigate a world filled with puzzles, quirky monsters, and an unsettling sense of déjà vu, a certain skeleton keeps popping up—startling you with his sharp wit and toothy grin. There’s something about him, though… something your heart can’t ignore, as if it was always meant to lead you here.
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Santuarytale by Harmony_of_Endless (RynoxPolux27)
Fandoms: Undertale (Video Game), Assassin's Creed - All Media Types, Multi-Fandom
17 Aug 2025
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Santuario
(Del lat.) Sanctuarium.1. Un lugar fundamental que ofrece seguridad, protección o refugio contra el peligro, la persecución, el dolor o las influencias dañinas.
2. La idea central es la de un espacio donde se está a salvo y, a menudo, se encuentra paz o consuelo. Además, proporciona asilo y cuidado a aquellos que lo necesitan.
3. Lugar sagrado dedicado a una deidad, objeto religioso o figura venerada.
4. Un espacio donde se puede encontrar calma, serenidad y aislamiento del estrés, el ruido o las perturbaciones del mundo exterior.
Series
- Part 2 of Libercordia
- Part 2 of Senderos fragmentados de Harmony
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After Subject 2 asks about his digital records, Dr. W.D. Gaster comes up with a new way to keep his experiments entertained.
OR.
The story of Handplates, as told through 2-P's little notebook.
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W. D. Gaster: the Heart, the Brain and the SOUL by WittyWind
Fandoms: Undertale (Video Game)
13 Aug 2025
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“The weight of the head of a genius is equal to its value.”
W. D. Gaster didn’t want to admit it, but he could feel it, deep inside him.
His brilliance gave a future to the Underground, a machine that could convert the heat of the Earth into energy: the CORE. The other monsters would, then, use it as electricity, and bring life to their houses and their TVs and their cars and their cell phones.
But Gaster knew more. Knew better. The CORE had so much potential, so much to offer. That kind of magic had never been used before. Gaster didn't know if he could call it “magic”, even.
He was so valuable to the Underground, but… what if that made him dangerous? What would happen if he had discovered something that shouldn’t be touched, not even by monsters or humans?
W. D. Gaster didn’t want to think about it, but he could feel it, deep inside him.
What is the value of a genius, if he’s so terrified of the weight of his own head to ever use it?
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Kris has screwed up beyond measure, but a second chance finds them in the darkness. As a corrupted, twisted manifestation of themself, they do everything they can to change the story and save this world. They just need everything, especially their former self, to play along perfectly.
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Entry Number 10:
I should’ve expected this would happen. Much like the specimen that received the irregular solution, I feel strange. My body temperature is slowly rising, and I ache all over. Typing this entry is already difficult from the tremors in my hands. I believe that despite the increase in magic, it doesn’t affect the magic relating to bullets and damage. I’m not entirely sure what the solution is targeting, but the heat is getting unbearable. I need a cigarette…
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Before the brothers, Gaster had a different approach to breaking the barrier.What happens when you don’t perform your experiments carefully and test them carelessly on yourself
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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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An Unhealthy Obsession by silverstormsxx
Fandoms: Deltarune (Video Game), Undertale (Video Game)
11 Aug 2025
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Gaster and his dearest.
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Once monsters had been released from the underground, the stage was set for a new revelation in the world of science. many people saw against integrating monsters into human society, but you encouraged it. with the discovery of magic and how it can interact with modern science. Now with the new applicants, your discovery will only increase and maybe your relationships with monsters, too. stay tuned for new journeys with your monster friends and learning things that have...multiverse impacts.
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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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what doesn't fill you with determination, is usually going to kill you. by Bite_me_baby6328
Fandoms: Undertale (Video Game)
04 Aug 2025
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gaster picks a victim and attempts experiments to "filly one with determination" it ends up.... interesting.
- Language:
- English
- Words:
- 949
- Chapters:
- 1/1
- Kudos:
- 3
- Hits:
- 22