1 - 20 of 231 Works in Cap'n (Deltarune)
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A KingTenna story that will be a realllyyyy slow slow burn. It's also based off the route where in Chapter 1 and 3 it's pacifist but Chapter 2 no one gets recruited. It'll make sense as the story moves along.
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Rhythm in Discord (Spamtenna HI-FI Rush AU) by zin3b0
Fandoms: Deltarune (Video Game), Undertale (Video Game)
28 Jan 2026
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Spamtenna X Hi-FI Rush, what more can I say?
Spamton is the youngest Addison with dreams of being a “Big-Shot Rockstar,” going against his programming. He meets a “Fr3Nd” who, at the cost of his arm, lets him reach higher.
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A Very Deltarune Purim Spiel by PietroFan420
Fandoms: Deltarune (Video Game), Jewish Scripture & Legend, Megillat Ester | Book of Esther
20 Jan 2026
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I've got terminal Deltarot and have been cast in my synagogue's Purim Spiel (a play recounting the holiday's story), so obviously this is the most logical conclusion.
This is the story of Purim, but Deltarune Chapter 2-ified. I hope you enjoy reading this as much as I did writing it, and I hope nobody ever performs this because it would be an affront to the Jewish God.
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My True Reflection by Jack_of_Knaves
Fandoms: Deltarune (Video Game), Undertale (Video Game)
08 Jan 2026
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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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Discorune by DennisLessing, Eeriemist, TheClockroach, TMZSeif
Fandoms: Deltarune (Video Game), Disco Elysium (Video Game)
06 Jan 2026
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PERHAPS A MORE
COLLABORATIVE
APPROACH
IS REQUIRED.In which W.D. Gaster decides to reject the autocratic model of personal government and embrace the glory of communism.
Or, Kris wakes up on Thursday morning with twenty-four squabbling voices in their head. Whether this is better or worse than being possessed remains to be seen; either way, it's sure to be interesting.
Updates Saturdays.
(Publishing will resume on Februrary 21st, 2026)
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Cyber High was like any high school. It had a principal, but everyone knew who the real king was. Only the rich, privileged, or incredibly lucky or talented could make it in Cyber High Boarding School. It didn't matter if your grades were good, as long as you had the money to stay. At the bottom of this popularity food-chain was Sweet and Cap'n. They were the nerdiest nerds that ever nerded. Being their friend was a death sentence.
But the new transfer student didn't know that.
Cakes Baker transferred from the city. He was recruited by the school for his skill in just about any sport imaginable. Not to mention, Cakes was an excellent actor and got the starring role in every school musical. Yet, this star player had more mystery to him than most new students do. Within his past, hidden behind a smile, told a story that he'd only dare to tell.
Their lives couldn't be more different. A sporty jock and two dull nerds could never mesh well together.
Good thing Cakes didn't know about the status quo.Series
- Part 1 of Musical Nerds | High School AU
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THANK YOU FOR YOUR TIME.
YOUR ANSWERS
YOUR WONDERFUL CREATION
AND YOUR UNDERSTANDING.
NOW.
WE WILL FORGE A NEW FUTURE.
WITH THE TIME YOU HAVE..
LET YOUR LIGHT SHINE THE WAY.
What if you could choose who you were in this world? Welcome to DELTARUNE, where you play as a custom character who will be staying with Toriel, a family friend of your father. You will be living in Hometown for a week or two, and there, you may encounter some wonderful people and make friends with a sweet deer girl, a gamer bird, and a caring prince of darkness along the way as you save the world from an incoming calamity! A fun RPG adventure that all players can enjoy!
(At the end of it all, this story is predestined to play out as planned. You will not be able to change the ending ahead of you. Do you accept this possibility?)
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The holiday season has fallen upon the world of Deltarune, and a young deer finds herself leading the charge for a holiday season she'll never forget.
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Help! My soul gained a body of its own by Akirathecat
Fandoms: Deltarune (Video Game), Undertale (Video Game)
06 Dec 2025
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Kris woke up the next day to see the cage empty. But that was strange, they don't remember putting the soul back in their body. They grabbed their chest to feel it, only to feel a strange coldness instead.
Meanwhile, after something hit the wagon. The soul flew off to find Kris to stop whatever they were doing. But after not finding them, the soul heads to castle town, where somebody had already had opened the door.
Series
- Part 4 of My soul gained a body of its own au
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Spamton finds Tenna's body at the end of Ch3. and sticks around, hiding away as Dealmaker while Tenna is being repaired. And one bad choice causes more harm than anyone would have expected.
Occasional voting on major choices that can change the story! [[KILL YOUR TV]]
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Zip Ties Vent Part 2: the (Unrelated) Sequel by guinea_piggle
Fandoms: Deltarune (Video Game)
23 Nov 2025
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Sweet Cap'n Cakes investigate the source of an excess of refuse zip ties.
Things do not go as expected.
Series
- Part 2 of Anti-Zip Tie Propaganda
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After being brutally dismembered by the Roaring Knight, Tenna resigns himself to fizzling out alone in the snow, forgotten, abandoned, and junked. But his former gameshow contestants and employees (tentatively... his friends...?) may still reach him! Back in Castletown, Tenna makes new, unlikely friends, is made to feel old, and learns that maybe he doesn't need to perform all the time off the stage...
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Deltarune Pokemon Teams by The_PaperPossumPost
Fandoms: Deltarune (Video Game), Pocket Monsters | Pokemon - All Media Types, Pocket Monsters | Pokemon (Main Video Game Series)
05 Oct 2025
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I made Pokemon teams for every Deltarune character that can fight from chapter 1 to chapter 4. There is no story here, just lists of teams and my reasoning for the teams of characters with more significant roles. I cannot explain why I made this beyond being so utterly consumed by the ideas I had that I had to write it all out so I could stop thinking.
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The Roaring Of A Blizzard by Mazhatter
Fandoms: Deltarune (Video Game), Undertale (Video Game)
11 Sep 2025
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Dark, Darker, Yet Darker
The Darkness keeps growing.
On Its Crusade, The KNIGHT Finds Someone Lost To Time And Poignant Memories.
It Raises Its Hand, And Plunges Into The Earth, Pure Darkness Erupting Out.
What Will Become Of Our Heroes When One Falls? -
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When defending Pluey against Cap'n in what should be a routine fight in Castle Town Battat finds himself in the school proper. Thankfully it's empty for the day but it feels... wrong. To be here.
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Ebbing Hopes and Flowing Dreams by OwnerOfAStory
Fandoms: Deltarune (Video Game), Splatoon (Video Games)
21 Aug 2025
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Pearl and Marina do what they do best when they arrive in Castle Town: make music! Acht does so as well, but more on the down-low. They generally prefer the underground scene, anyway.
But, perhaps they’d prefer something a bit… darker going forward?Series
- Part 5 of Welcome to our Castle Town!
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My personal interpretation of the lore of SCC!!!
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Cognitions of Hopes and Dreams by OwnerOfAStory
Fandoms: Deltarune (Video Game), Persona 5
14 Aug 2025
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After meeting Susie and Kris, it’s time for the Phantom Thieves to meet the final member of the Fun Gang in his own home! True, the Thieves may be facing one of their greatest challenges in what is supposed to be their summer holiday, but a short break never hurt anyone. Ralsei in particular is eager to welcome these new guests with open arms, but what will the Phantom Thieves and the residents of Castle Town make of each other?
Series
- Part 1 of Welcome to our Castle Town!
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K_K feels upset, and can’t find out why. So he takes a walk around castle town, because walks in nature fix everything!
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AMARANTHRUNE by Thornless_Rosette
Fandoms: Undertale (Video Game), Deltarune (Video Game)
11 Aug 2025
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"Amaranthine: Immortal; Undying; Unfading."
2 Years.
2 Years since they fell into the ruins.
2 Years since they had freed all monster kind and managed to have brought back Asriel and Chara.
And 2 Years since the beginning of a new era.
Frisk and Kris, the siblings that were adopted by the Dreemurr family, have started a new life in Hometown, Humans and Monsters finally at peace. It was great. In general really. However, Asriel and Chara had gone off to college, and Kinnsley, the duo's sister, was being homeschooled as per her request. The Dreemurr siblings wouldn't exactly call their life bleak, but it was like any other normal school.
Jared and Jenna Tumbles, a pair of twins that have recently moved into Hometown next to Frisk's and Kris's house, have met the siblings before when their parents had met up in a playground. Now, they got along just fine!
Until Jared and Kris might be wondering if they're falling for the other.
With school life, the upcoming festival, and the realization that they'll have to tackle their trauma soon, the kids make some unlikely friends along the way-both lightner and darkner.
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