1 - 20 of 245 Works in Determination (Undertale)
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Summary
(inspired by Dusttale and Deltarune)
Imagine what someone would do to change fate.
To make their choices matter.
To make things different next time.
How far would they be willing to go?
How far would you go to make a change?
How far would you go to see... every last detail a world has to offer?
How far are you willing to go... to satisfy your curiosity... your desire to discover something new?
The answer here... is simple.
Very far.
Far enough to break everything...
Until nothing remains but dust, blood... and ice.
(formerly named FrozenRune)
(This is the main story. The previous work is now the "skeleton" of this, when everything was just a bunch of ideas without much connection between them.)
Series
- Part 2 of Runes of Ashes: Whispers of Frozen Dust
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The soul of Determination. MLP by therandomreader1009
Fandoms: My Little Pony Generation 4: Friendship Is Magic (Cartoon 2010)
16 Oct 2025
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y/n is the soul of determination. They've traveled a lot to get here, going through all sorts of universes and such, but now they've found a very peaceful world and plan to stay here for the rest of their "life". However, they are foreign to this world's magics and way of nature. How will this world react? Can they find a place to fit in? And most importantly, how will they get a body of their own? All this and more is coming now.
A slight warning, the plans I have for y/n makes it so we can't have this world be the normal MLP Friendship is Magic world. So we're gonna need to make the characters of this world anthro, if that's the right word.
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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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Nine strangers. One fall. A power none of them understand.
When eight teens and a young girl follow a mysterious light into Mount Ebott, they expect adventure. What they find is a crumbling underground world of monsters, magic, and ancient conflict. But that’s not the strangest part.
Each of them awakens with a glowing SOUL—a trait linked to their heart, their will, their essence. But these SOULs don’t stay still. They shift. Swap. Sync. And with every battle, their bond grows stronger… or more dangerous.
As they struggle to understand this new power, they’ll face old threats, cryptic warnings from a familiar talking flower, and a world that remembers the war they never fought.
They just wanted answers. Now, they’re part of something much bigger—and something down here is watching.
Welcome to the Underground. Stay determined… or get creative.
- Language:
- English
- Words:
- 10,929
- Chapters:
- 11/27
- Hits:
- 46
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Summary
Policing.
Something that meant a lot for Brett, protecting human life against the dangers. But one day, her life along with three others would change forever when they somehow travelled to another world.From a path of law and authority
A role to maintain peace and protect the public from dangers
A oathDisappearing off the map
Strangers in a strange universe
You can't go back home now.Loop Loop
Trapped Trapped
No way back?
Now having to go towards a path of running and constant hiding.
A new role to survive and find out why they're here.
A Rogue OfficerLeft with no choice but to be a moving fugitive.
You won't even see them in the shadows of the night.
The light only brings eyes
But they are sure good at running away."Because I am not going to die here of old age, knowing that we're stuck in this world forever."
Stranded humans.
In an anthropomorphic world.
We're against all odds now, make that a promise.
We will win.You can find this story on here and on Wattpad.
I'll be transporting my published chapters from there to here.
My Wattpad - BasilManCard -
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Summary
Frisk didn't like the outcome of the date at the MTT resort.
That's okay. She could just use her determination to live through it again, make better choices, say some better words...
All she had to do was die. Like, right now. Even if someone was there to witness it.
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Hope, the white pen that can overwrite the dark. It inspires and brightens, but alongside hope are dreams: a guiding light through the darkest of nights.
In the depths of a scarred dark world, a titan spawn gains memories it shouldn't have and begins its climb into that light. But along the way, it'll learn that dreams are made to be crushed.
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"Long ago… a child fell into the Underground."
They faced monsters.
Made friends.
Survived impossible odds.
Fought. Spared. Forgave.
Even when the world told them not to.A queen of monsters…
A skeleton of greatness…
A captain of honor…
A robot made to kill…
A king with a broken heart…
A soulless plant…
A god of Hyperdeath…And yet…
They showed mercy.
And through their DETERMINATION…
They broke the barrier.
They set everyone free.But that was only one story.
Now, the child walks into a new world…
A world of Skullgirls.
Here, pain repeats.
Wishes corrupt.
Hope turns to dust.The cycle continues:
A wish is made.
A Skullgirl is born.
And the world bleeds again.People fight to survive.
Others fight to forget.
Some fight… just because it’s all they know.Can they change hearts warped by despair?
Or will even they…
Give in?This world is cruel.
But like before…It’s up to you.
Will you break the cycle?
Or will you become a part of it?
The choice is yours.
(But remember... you were filled with DETERMINATION.)
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Deltarune: The True Sanctuary. by The_Universal_Maker
Fandoms: Deltarune (Video Game), Undertale (Video Game)
25 Sep 2025
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Summary
The 3 heroes of prophecy are now fated to find a dark world that fits neither their prophecy or The Knight's usual pattern.
Can they save the day?
Who is the Knight?
Nobody knows, its reveal may or may not happen.Series
- Part 2 of The nexus experiment
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Summary
Gather children, listen well, harken to the Under Tale.
A story of a small child, falling into a massive cavern where monsters have made their home. With the help of a certain phantom, the child makes their way through the Underground, making friends & family along the way.
I own absolutely nothing in this. Undertale, along with with characters, setting, etc., belong to its respective owners, who are not me.
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for even the flowers have forgotten you, by golenlovkett_ueowip
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Undertale (Video Game)
17 Sep 2025
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Summary
Eraserhead tracked Bakugo’s movements with ill-hidden annoyance, mouth pressed into a thin line. His gaze lingered on the space behind his student, then around the hallway. His frown deepened.
“What are you doing?”
Whatever answer his teacher wanted, an annoyed gesture at the kid beside him and an unimpressed look wasn’t it.
“If you wanted something from another teacher, it can wait. Classes should be starting in five minutes.”
“Yeah, whatever.”
Irritation scratched at Bakugo's throat, leaving him parched and hateful. He took a swig of his drink, mouth twisting in obvious displeasure. When the fuck did his drink get so disgustingly warm?
Fucking typical.
“...Chara.”
What?
“Greetings.” The strange kid looked at him, him alone, and smiled. “My name is Chara.”
In which Bakugo Katsuki dies, and learns that even death cannot hold him. This changes everything.
(*No prior knowledge of Undertale and its mechanics required, though recommended.)
Prologue: 1 - ongoing
Now has a dedicated tumblr blog. Ask me anything.
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Summary
(Inspired by Dusttale and Deltarune)
Imagine what someone would do to change destiny.
To make their choices truly matter.How far would they go?
How far would you go, just to see a single change?The answer here… is simple.
Far enough.Far enough to shatter everything, until nothing remains but dust, blood… and ice.
(Just a bunch of ideas stuck together with tape and without much development because I had no idea what I was doing, but I've already started the real story, which is the second part of the work, so... go ahead, read that one instead.)
Series
- Part 1 of Runes of Ashes: Whispers of Frozen Dust
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I'LL PAINT THE KITCHEN NEON, I'LL BRIGHTEN UP THE SKY. by Sneakyfox55
Fandoms: Undertale (Video Game)
28 Aug 2025
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Summary
Sans gets sick.
Series
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Losing my breath by Sitri617
Fandoms: Re:ゼロから始める異世界生活 | Re:Zero Starting Life in Another World (Anime)
22 Aug 2025
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Summary
The world of Od laguna is destroyed by a mad scientist.
The survivors and the people of earth are left to pick up the pieces
Alternative path to my every breath you take fic.Thus is the path that allows for happiness for two broken worlds.
This is blasphemy.I put it right there made it easy for you to get too
Now you act like you don't know what to do
After I done done everything that you asked me
Grabbed you
Grind you
Liked you
Tried you
Move so fast
Baby, now I can't find youSeries
- Part 2 of Bad Romance
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Summary
Susie's determination helps save the fun gang as they battle the knight for the first time!
- Language:
- English
- Words:
- 612
- Chapters:
- 1/1
- Kudos:
- 3
- Hits:
- 80
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Summary
This is not a tale of slaughter for the so-called "greater good".
This is a tale of one who has grown tired of such slaughter, bringing justice to so-called mistakes of the multiverse. A tale of a faceless killer... of "Dusttale's Endbringer".
- Language:
- English
- Words:
- 3,673
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 38
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My True Reflection by Jack_of_Knaves
Fandoms: Deltarune (Video Game), Undertale (Video Game)
27 Jul 2025
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Summary
When Chara Dreemurr lay dying in the Hall of Judgement, all they could think about was seeing Rei again, wrapping their arms around their fluffy brother, and telling him just how sorry they were that they couldn't protect him, that they couldn't protect them all, from their twisted reflection.
What they didn't expect after their eyes shut was for them to open again in an unfamiliar room inside something called a hospital with their wounds cleaned and tended to before being taken into the care of a doppelganger of their mother and what seemed to be a second reflection, named Kris.
What they expected even less was to find themselves part of a prophecy that foretold the world's destruction and how it would be saved by Four Heroes: two humans, one a noble warrior, strange and mischievous yet just and brave, the other, a devilish rogue from parts known yet unknown, a monster, brash and bold, and a lonely prince from the dark.
But, what Chara didn't expect least of all, was them and Kris growing closer over the course of their adventures... and coming to see each other not merely as reflections in some unseen mirror, but as something more, something deeper, something intimate.
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let us move on to the next. by Buttercup_ghost
Fandoms: Deltarune (Video Game), Undertale (Video Game)
13 Jul 2025
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Summary
Chara and Frisk get isekai-ed to a world where the human and monster war never happened, and someone named ‘Kris’ takes both of their places—with everyone seeming happier for it.
…This mess of emotion is only made worse by the fact that they are now possessing said replacement.
Kris might have some things to say about this arrangement…
(In which The Angel is two children in a trench coat, Chara and Frisk decide possessing someone is really the least of their crimes, and Kris is on vaguely-genocidal-children babysitting duty. They would say "Angel help us," but, well...)
Series
- Part 126 of crossover works
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DeltaVide by Lupin_TheAlpha
Fandoms: Deltarune (Video Game), Undertale (Video Game), Dungeons & Dragons (Roleplaying Game)
10 Jul 2025
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- Language:
- English
- Words:
- 2,946
- Chapters:
- 1/?
- Hits:
- 3
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Interlopers by Jack_of_Knaves
Fandoms: Deltarune (Video Game), Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
08 Jul 2025
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Summary
After Sans' machine malfunctions, The Fun Gang and Noelle Holiday find themselves pulled into the events of the Glitchtale AU, where they prove to be invaluable allies against the evils that threaten the world and its people, human and monster alike.
However, by merely being present in the Glitchtale Universe, Noelle and the Fun Gang have unwittingly raised the stakes by a considerable amount, as breaches in the fabric of the space-time continum begin to appear, allowing humans, monsters, Lightners, and Darkners from their dimension and a myriad of others into the universe the quartet now find themselves in, including new allies that join the fight on the heroes' side, as well as newer, deadlier threats from all across time and space that, thanks to the breaches, now threaten the entire multiverse.
Can our heroes survive the coming storm? Or is all of time and space doomed to fall to darkness?
Let us begin the experiment and find out together, shall we?