1 - 20 of 1,997 Works in Napstablook (Undertale)
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Without History (maybe some things should stay forgotten) by Human_with_no_life
Fandoms: Undertale (Video Game)
30 Sep 2025
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Summary
After the barrier breaks and monsters and humans live together on the surface there is still mysteries about the underground to be solved. Most of them will stay forgotten or buried forever.
Until an almost promise Sans made frisk makes him tell a long and complicated story. His story, well not exactly 'his' but as many questions as it answers it raises more. One thing if for sure it will change everyone involved.
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Summary
You are still curious about the monsters but this time it's the minibosses that have your interest.
Series
- Part 2 of R.I.P.
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Sketchbook Log No.1: Happy 10th Anniversary, Undertale! by FrankieThunderkitten
Fandoms: Undertale (Video Game)
29 Sep 2025
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Summary
Tossing my proverbial hat into the UT 10th Anniversary ring
OR
How I made this sketchbook spread for Undertale's 10th anniversary!
Series
- Part 1 of Sketchbook Logs!
- Language:
- English
- Words:
- 535
- Chapters:
- 1/1
- Hits:
- 8
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Stuck On Air by Audio_Interference, lovebargain (coyotes), psychedelia
Fandoms: Deltarune (Video Game)
29 Sep 2025
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Summary
Between set schedules, filming, script readings, proof-editing, dress rehearsals, and his own hang-ups about those star-studded events, Tenna rarely makes a public appearance. This time, though, there was no saying 'no' to the offer of a lifetime: an extravagant, exclusive invitation to an all-expenses-paid gathering of high-profile award winners.
Mettaton and Tenna find themselves in the same limousine, where their first meeting takes a sharp left turn as they find themselves caught dead in the middle of an assassination attempt.
Real drama! Real bloodshed! Real Pippins! Real... Feelings?! Scrap that last part.
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UNDERTALE: Surface Tension by Seraph_UTST
Fandoms: Deltarune (Video Game), Undertale (Video Game)
29 Sep 2025
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Summary
A long time have passed since Frisk led monsters to freedom. Now sixteen, Frisk finds themselves presenting that very story to a class full of humans and monsters
You'll meet Frisk, now sixteen, free from your control, and still carrying the weight of their choices, doing their best to bridge two worlds with kindness and honesty.
Seraph, your new vessel, a quiet, artistic boy of unknown origin who lives with Gerson and looks up to Undyne like a big sister. His drawings are oddly prophetic… and sometimes, he can feel what others feel.
Lapin, a rabbit monster new to the surface and overwhelmed by the change... maybe even a little lonely.
MK, once known as Monster Kid, now a confident chatterbox still idolizing Undyne (and maybe trying to figure themself out).
Vesper, a bat monster with a protective streak and a soft heart they try VERY hard to hide.
Aiden, Seraph’s loud, loyal best friend, a jokester who’s like a brother to him, always ready to stir up trouble or crack a smile when things get heavy.This is a story about what happens after the story ends. About choices, big and small, that shape who we become.
And sometimes… it gets weird.
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C:\New Folder\New Folder\New Folder\New Folder\New Folder\New Folder (1)\Private\Stories by WheatTooth
Fandoms: Undertale (Video Game)
29 Sep 2025
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Summary
Mettaton tells us that Alphys wrote of herself with Undyne, so here's a glimpse at that. While we're at it, also her self-ship fiction with other people she knows (and a couple from her imagination).
Wrote this silliness in 2015-2016 and am just now putting it on AO3.
- Language:
- English
- Words:
- 829
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 10
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Summary
It's been three years since you fell into the underground and found a family among the monsters of the Ruins. You love your life here with Mom, your ghost buddy Blooky, your prickly friend Flowey, and the host of Ruins monsters who have accepted you as their own, but things can't stay this way forever. Your friends deserve to see the sun, and there's a prophecy to be fulfilled and a barrier to be broken. Your determination pulls you onward.
The only trouble is that you'll have to make it through an underground full of monsters clamoring after the red SOUL in your chest, and each day as circumstances become more dire they lose a little more hope. This is a more desperate underground than the one you landed in. The odds don't look good for one pacifist child with a stick.
Of course, you aren't completely outmatched. You've spent the last three years training for this moment, and you don't intend to let anyone hit you.
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Dualtale AU: Two sides of truth by ED_Soul
Fandoms: Undertale (Video Game), Underverse (webcomic)
28 Sep 2025
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Summary
Description:
This story is based on the distant and little-known Dualtale AU,where nothing is as simple as it seems. In this world, unlike the original Undertale, monsters were never trapped underground. But what was the price for peace between humans and monsters? And how is it connected to XGaster, when these events unfolded long before the X-Event?
(Features characters from Underverse and Undertale,adapted for this story.)Author's Note:
In the Dualtale AU,the famous rule "Kill or Be Killed" is replaced by another:
"Speak out, and you will be silenced."
This is a universe built on lies and dark secrets that everyone holds.Every character has their own agenda and their own rules—and it's better not to try and learn them.Series
- Part 1 of Dualtale AU: Two sides of truth
- Language:
- English
- Words:
- 1,999
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 3
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
27 Sep 2025
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Summary
It's been a few years since Monsters returned to the Surface and lots of things have changed... Accompany your favorite characters from Undertale, Undertale Yellow and Deltarune as they try to manage their everyday responsibilities and go through a few wacky adventures while at it in this slice-of-life crossover AU.
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Two souls in the Underground, intertwined by fate and by a prophecy that keeps them apart.
Heads up before you read:
In this fic, Chara is alive and far from a good person. They’re not a mindless killer, but a narcissistic kid. This is not a fluffy Charisk story. Chara and Frisk’s relationship is deeply toxic.Please look at the tags before you continue.
I've been experimenting with third person for a while now, and I've grown to like it a lot more than first person. For those who came from my other fic, which I promised a sequel for, I’ll try my best, but I’m not sure how that will go now that I’ve fallen in love with third person and started a new long fic. Please don’t be angry I will try to finish my other fic as well.
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Unexpected Hero by LemonCake64
Fandoms: Undertale (Video Game), The Legend of Zelda & Related Fandoms, The Legend of Zelda: Twilight Princess, Deltarune (Video Game), The Legend of Zelda: Ocarina of Time
26 Sep 2025
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Summary
“Not so fun being stuck in some loop right? Trying to fight to protect what ya got, not getting a choice in it. If I had the choice I wouldn't remember either.” The words oddly felt comforting. Link let out a slow breath, closing his eyes for a brief moment.
He didn't feel alone for the first time in a long time.
And that?
That was terrifying.
“To be honest, I kinda gave up a while ago. Just sat back and let the chaos go on, felt like nothing I did mattered anymore. Everything would just be reset anyways. Stopped caring what happened, that was until you showed up.” The skeleton’s eyes bore back into the Hylian.
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Frisk couldn't recall exactly how many times he had been in this same position.
He had lost count on how many times he tried and failed. Lost count on how many times he had died. How many times he had RESET.
It didn't matter what he did, he always ended up failing. No matter what choice he made, he failed.
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.[GAME OVER]
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.CONTINUE [RESTART] ?
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.* you called out HER name……
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.* .......and SHE answered.
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Summary
Tenna was the perfect distraction- from the outside world, from others, and, most importantly, from himself. Because when Mettaton watched that TV, put himself in the shows, he could pretend he was someone beautiful, popular, successful. Not the loser he was. Not a useless nobody.
He was rotting away.
Tenna noticed.
(Slightly inspired by the movie I Saw The TV Glow).
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Long live the Monarch! by urmom_friskas for Alexandra_green
Fandoms: Undertale (Video Game)
25 Sep 2025
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Summary
After King Asgore’s death, the Underground was left leaderless. Gravely injured from her fight with the human, Undyne was in no condition to rule, so Mettaton stepped in to take her place until she could recover. However, after some time he vanished, forcing the monsters to search for a monarch once more. Then, quite unexpectedly, Alphys proposed a candidate…
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Imagine if the person who fell to the UNDERGROUND wasn't Frisk? What if it were someone completely different, someone in control of not only their choices, but their powers as well? Meet Grace, a young adult who just happened to be walking through the woods the same day Frisk decided to fall. Grace managed to SAVE Frisk from their usual fate, but only in exchange for hers; Grace falls down into the UNDERGROUND. As she makes friends and walks through the UNDERGROUND, read to see how a different character might have made her decisions on the same path an innocent child took - and how she might ruin it.
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You’re a scientist! Yes you! And you’re going on a trip through the multiverse! Dw, you did it on purpose
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Aria finds out that her boyfriend had been cheating on her. She runs away ending up on the mountain and sees a small child nearing their way over the edge of the abyss. She quickly tries to stop them only to fall and the two end up in the Underground.
A Papyrus story.
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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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You were finally getting your life back on track. Juggling college courses and a new job, you were slowly but surely rebuilding from the ground up, convinced the worst was behind you. That all changes when a magical summons you can't refuse rips you from your world and drops you into a house filled with powerful, skeletal monsters who despise you before you’ve even said a word.
To them, you are the arrogant and careless human who shattered the soul of their dearest friend, the gentle mage Lyra. They see you not as a person, but as a living tool—a magical "key" they require to heal the damage you supposedly caused. Trapped in a multiversal nexus with no way home, you must navigate a gauntlet of relentless animosity and suspicion.
Every word you say is twisted, every action is judged through the lens of lies you don't even know have been told. How can you survive in a home that isn't a home, surrounded by enemies who believe they are the heroes? And how can you prove your innocence when the true manipulator is the very person they've sworn to protect?
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A rewrite of the college fic that I wrote. I really wanted to redo it and make it better because I spent a lot of time building it. I don't know if this counts as my own AU because there's other college AUs and stuff, but this is my take.