1 - 20 of 4,031 Works in Post-Undertale Pacifist Route
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Making A Monster by absurdmagewrites
Fandoms: Undertale (Video Game), Underfell-fandom, Underswap-Fandom, Swapfell-Fandom, Fellswap-Fandom, Fellswap Gold-Fandom, Horrortale-fandom, Crafttale-Fandom, Seaswap-Fandom
05 Oct 2025
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Summary
Sometimes life throws you a curveball. For you, your curveball was going to bed looking like a human, and waking up looking like a monster.
A skeleton monster to be precise.
With the barrier breaking, a large surge of magic descended on the town you live in, and transformed you overnight. Unsure what to do with you, and the others changed, you're ushered into a facility until a monster with similar magic can take you to teach you how to wield the now uncontrollable magic you've been given. After waiting in this place for four years, you'd given up hope that anyone would ever want to take you.
What a surprise for you when you find out that someone does. A lot of someones.
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Just a normal day, Asgore and Toriel have parted ways, but still held together by old experiences and memories
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Your eyes squint. This isn’t Flowey. Can’t be Flowey. Flowey would’ve told you to get a move on already, impatient vine thumping your back as you (with great difficulty) wrench your eyes away from the glowing diamond clasped in his prickly thorns.
But there’s something familiar about the way he’s holding you. The way his hand is clasped against the small of your back, holding you as though without his grasp you might slip. The lilt of his voice.
“I was this. Before.” And Flowey takes a deep breath. “Before I died. And then after I died, I became Flowey. My old name was Asriel.”
And, for the second time, Clover is born.
Series
- Part 2 of mirage's utydr oneshots
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Summary
Velva never had any contact with any other skeletons until she met Sans and Papyrus, who seem a bit more knowledgeable about their species. In an effort to learn more about themselves, Velva decided to experiment with sans.
...
This is a story where you, yes, YOU, the reader, get to decide what these two characters do.
Just by commenting your favorite kink, position, or prompt on this Fic, excluding anything that falls under Age play or something that may be
considered a felony!This collection will feature mini-comics ranging from 1 to 10 pages (depending on my motivation) once a month.
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Monsters were freed from the Underground and Mettaton was very quickly considered one of the biggest celebrities in the world. But at what costs?
That's mostly Papyton fic centered around Mettaton, but there's also another relationship at the beggining (but papyton rocks)
- Language:
- English
- Words:
- 1,083
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 10
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Summary
Gaster was just finishing off his cake when a neighboring party set off the first firework of the night. The skeleton jolted at the boom that quaked the mountain beneath them. Gaster did his best to quiet his rattling as colors burst in the sky. Grillby sat close and wrapped his warm arms around his shoulders. The skeleton took a breath and melted into the embrace.
Grillstertember prompts: Fireworks and Fireflies
- Language:
- English
- Words:
- 648
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 16
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Bonus Content by SpectrumWriting
Fandoms: Undertale (Video Game), Deltarune (Video Game)
04 Oct 2025
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Summary
Something has gone wrong.
Ten years into their happy ending, Frisk wakes up back in the Underground with no memory of reseting.
A few hours after parting ways for the night, Kris and Susie wake up in a strange new Dark World... again.Frisk's save file has been corrupted. Kris's soul isn't behaving how its supposed to. And Ralsei shouldn't be here at all.
An epilogue and a story half-told can't coexist without some conflict involved. -
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- Language:
- English
- Words:
- 1,675
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 63
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Blooming Flowers by thedorkyturtle
Fandoms: Deltarune (Video Game), Undertale (Video Game)
04 Oct 2025
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Summary
Five years after the barrier shattered thanks to the human Frisk and monsters were able to join the humans again, Spamton and Tenna found themselves settled in peaceful domestic life with their daughter and their self made flower shop.
SpamTenna Week Day 7: Free Day
Series
- Part 7 of SpamTenna Week 2025
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A Future Without Them by Baddrummer
Fandoms: Deltarune (Video Game), Undertale (Video Game)
03 Oct 2025
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Summary
Years pass. People grow. The world moves on without you. The Angel grew content with that for a while. It still hurt whenever they thought of the world that had long banished them, but something new pulled them out of the depths. Now, the Angel walks amongst friends who swear that they will not be banished. Kris, Susie, and Ralsei mean everything to them. Maybe this time, their banishment doesn't have to be as set in stone as they thought.
The Roaring comes. The light falters. Everyone falls.
A desperate connection is established in an attempt to save what remains of the Angel. If they fall, all hope will be lost. The world that banished the Angel long ago has forgotten them, but they have not forgotten it. This connection will have to be enough. Even if the rules have changed irrevocably, the Angel's one goal remains the same: Find them.
Series
- Part 2 of Clawing Toward What Hope Remains
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Summary
The Seven (Plus Chara) have done it; they've ended the imprisonment of all monsters. With Frisk as their ambassador (and Papyrus as mascot), things are sure looking up!
But in the background, things are at play, events that could threaten everyone's happy ending.
After all, just because one story ends it does not mean the Tale has.
Series
- Part 2 of Hall of the Seven
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Broken beyond repair, Spamton and Tenna spend the last of their days rotting among the trash of the underground. Luckily, they had a savings grace that brought them to the surface.
SpamTenna Week Day 6: Alternate Universe/UTSpamtenna
Series
- Part 6 of SpamTenna Week 2025
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Regrowth (one step at a time) by Pillow_Fort
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game)
03 Oct 2025
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Summary
Or, Clover is revived after the true pacifist ending. Follow their journey as they reunite with old friends, discover new things, and help solve the interpersonal drama of the underground! (most of which is just them getting adopted)
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A FINE LINE BETWEEN ORANGE AND YELLOW by Fantasy_Artist
Fandoms: Undertale (Video Game), Original Work
03 Oct 2025
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Summary
While Aneira didn't necessarily believe monsters existed, she did find the fact that everyone and their dog still did might mean something. Her childhood town of Beddgelert believed in monsters trapped under the mountains near their home that would need a seventh soul now to break out and destroy lands.
Aneira also knew that she needed to figure out what happened to the kid she was friends with who went missing. Which was how she found herself having fallen (probably) hundreds of meters below a mountain inside a cave system. Was she stupid for leaving without telling people where she was going, definitely, but, to be fair, she didn't expect to fall; she couldn't even see the hole.
Injured and wanting to go home, Aneira braves through the underground cave systems, finding MONSTERS both friendly and foes, learning about what happened to all the previous (children) HUMANS that fell.
tldr: Aneira falls instead of Frisk, is injured and is too stubborn not to use this chance to find out what happened to a friend (definitely dead by now, but she still wants to confirm), the Undertale cast feels like something is different, but not what. They also live in Wales here because why not?
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Alphys fantasizes about her ideal scenario with Undyne and things get messy.
Day 2 of Kinktober: Cumming Untouched
Series
- Part 2 of Kinktober 2025!!
- Language:
- English
- Words:
- 487
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 40
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There was no hope.
There was no way out of this place. Sans knew that from the depths of his soul- he couldn't escape on his own. But without any way to contact anyone and no knowledge of where he's trapped, all he could do was try to survive... or maybe just hope for death.
No more resets, after all.
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Wake up buried in snow, alone, and with no memories?
Check.
Kepp seeingg numbers, words, and text floating around every object and surface as far as the eye can see?
Also check.
Why does every person he meets say he needs help?!
His perfectly fine if you ask him."I wonder what determination taste like"
Note from the author:
This is my take on Fatal Error—a much more none canon, this isbt even OOC this is just straight up diffrent person with the same name, amnisiec version of him.
He’s also not fully canon-compliant in terms of power scaling and has and maybe different origin and personality.
It’s my reimagining of him.
Glitchy, lonely, and filled with questions, bad puns, power to blow up annoying people and some more puns. -
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The barrier has been destroyed. After an era of isolation underground, monsters are free once again. They long for a peaceful union with humanity, but they aren’t sure if humans are ready to welcome them. To prevent history from repeating itself, the monsters decide to study human society, hoping to understand whether people are open-minded enough to accept those who once lived underground. Thanks to Alphys’s technology, a small group of monsters - guided by Frisk - secretly infiltrates the surface to carry out this mission.
Your life feels like it has reached a point of no return. You left Europe hoping for a new beginning. However, your hopes for salvation don't seem to be meeting your expectations, not here in California. Still, you refuse to go back. You believe that your situation will improve over time. With this mindset, you adapt to your new circumstances, suppressing your depression as best you can, accepting a job you hate by telling yourself it's only the beginning. After all, you have to start somewhere, right?
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A phrase or opinion that is overused and betrays a lack of original thought.
A cliché.
Being rescued by a skeleton? Fake dating? One bed? A childhood best friend?
Mutual pining?
Well. Who could say no to all that!
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You're a spy who is ordered to spy on the queen of monsters but two skeletons get in your way