1 - 20 of 41,330 Works in Sans (Undertale)
Navigation
Listing Works
-
Tags
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.
-
Tags
Summary
You, dear reader, have been transported into your own AU — as Sans.
Just when you’d begun to settle into this new, bone-white life, one small mistake sends everything spiraling.A malfunctioning machine, a flash of blinding light, and suddenly you’re falling through worlds — each one a reflection of stories you once imagined, and others you never dared to write.
Gaster calls it an experiment. Papyrus calls it an accident.
But Sans — your Sans — knows it’s something deeper.Every jump takes you further from home, and closer to the truth behind the tether binding your souls.
Will you find your way back… or lose yourself to the story you created?Whatever happens — the worlds will never be the same now that you are part of them.
-
Tags
Summary
You are a shapeshifter with the rare ability to turn into an orange fox—a secret you’ve kept hidden, knowing humanity once hunted your kind. Living near Ebott, you slip into the night to run free, though the fear of discovery always lingers. Meanwhile, Sans and Papyrus have unknowingly welcomed a manipulative woman named Kora into their lives.
Behind her sweet facade, Kora is a gold digger using the brothers for wealth, status, and comfort, willing to lie, fake affection, or even blackmail them if needed.Eventually Kora stumbles across your apartments terrible condition, deciding to become “friends” with you and inviting you to stay in the mansion with her and her apparent mates. It started off fine, until she began to spread lies— rumors.. Even blaming you for mistakes, stealing. And god who knows what else.
Maybe you can help these skeletons see past whatever game she’s playing at? (Anti-Harem, That’ll switch into a actual harem..)
As well as machine chaos.
-
Tags
Summary
Sans meets an old robot monster whilst doing some CORE chores. It... gets interesting. And it will definitely not lead to anything. But that's later. Maybe. Sans is older than popular assumption.
- Language:
- English
- Words:
- 1,488
- Chapters:
- 2/?
- Hits:
- 7
-
Tags
Summary
Where Killer drinks one of Ink’s paints on a dare, and you reap the consequences.
-
I'm Never Gonna Know You Now, But I'm Gonna Love You Anyhow by sweet_bellyache
Fandoms: Undertale (Video Game)
10 Nov 2025
Tags
Summary
A decade ago, your quaint town fell prey to the greedy hands of violent gangsters, and life as you knew it went to shit. Your area became dangerous, depressing, terrifying, especially at night. All you have is the pizza place you inherited from your father. Your future seems bleak.
One fateful night, a monster walks into your establishment, not ten minutes before closing time. Something about that night… you wonder if holding onto a semblance of hope might be worth it this time.
-
Tags
Summary
Side stories or one-shots depending.
Each chapter will be labeled appropriately.Series
- Part 2 of RuinFell
-
Tags
Summary
Dust scared you. He scared you more than all the rest of his team put together. That being said, you were going to help him through this little mishap even if it killed you.
Series
- Part 2 of Turned Into An Animal (Sentence Prompts)
-
Tags
Summary
The Multiverse is breaking apart due to how many AUs are being created, but for whatever reason the only person who can safely put a stop to it is refusing to cooperate despite the dangers. Reluctantly, someone makes the decision to take things into his own hands and creates another glitch in hopes of being able to help the Destroyer keep up before it's too late.
Waking up in an endless white expanse, Blueberror isn't exactly sure of who he is, where he is nor how he ended up there. He ends up meeting another skeleton — Error — and the two quickly hit it off.. so he thinks. What was thought to be a dream quickly turns sour as he realises that Error isn't all he's cracked up to be, his tantrums getting worse the longer Blueberror remains within the Anti-Void.
As much as he'd like to leave, with Error's protectiveness and wholehearted refusal to cooperate with him there's nothing he can do.
Right?
-
Another Ending by Zekyn
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
10 Nov 2025
Tags
Summary
What if one pivotal moment had gone differently? Chara and Asriel find themselves facing the aftermath of choices that could have ended them both.
-
Tags
Summary
You'd never expected to be one of those people who bonded with a random stray, and if you did, you never expected it to turn out like this. The tiny... blob of an animal was cute, affectionate, and melted your heart before you'd even named him. Unfortunately, not everything is as it seems. You've met this lovely creature before, and he definitely remembers you...
-
Tags
Summary
Monsters have come to the surface, and with that a lot of probelms have been caused, so maybe a marriage between two people from the two races might help?
-
Tags
Summary
Papyrus buys a game, but it's so weird...
-
Tags
Summary
Disclaimers:
Several details in this fic are heavily inspired by 'Blue joins the bad sanses' comic, so go check that out
Canon innacuracies: Passive and Corrupted Nightmare are the same person, Ink is the creator and not the protector, Ink, Error, Nightmare, and Dream, are all gods, Blue, Killer, Horror, and Dust's specific au timelines were all destroyed, and i took liberties with how the void works. Also, no Cross sans will be mentioned, i don't know enough about underverse, and there will be some OC non-sans God/entity/things later on. The fic will be split into parts, each lasting nine chapters.
Schedule: Once a week, on Saturday, Sunday, or Monday, and i will post art or a reference sheet with every chapter. Trigger warnings will be specified in chapter notes. I've never written for undertale before, so please let me know what you guys think :3With that said, the actual plot: After an injured Error crashes into Nightmare and Co's home, a close bond starts to form between the two gods, both forced villains. In light of Ink's attempt to kill Error, Dream finally starts to lose it, and Blue gets dragged along.
Average chapter length is 500-2000
Series
-
Tags
Summary
You have had a tough life that has left you scarred and untrusting of others. Growing up in a mage family obsessed with power and ensuring their lineage, you are the black sheep of the family, possessing a green soul of kindness and excelling in healing and growth rather than the combat magic your family specializes in. Trapped in a loveless relationship with a controlling, abusive partner chosen by your family to ensure a 'proper' match, you live in fear of triggering his anger, often resorting to your magic to heal yourself. Every aspect of your life is controlled by someone else, leaving you resigned to survival and scraping together what happiness you can.
What you could never foresee is the way a miserable night out with your fiance would lead you to a drunken one night stand with your soulmate.
Nor could you predict you would have 9 more soulmates out looking for you.
-
Tags
Summary
Oneshot stories of the Temnox Ship (Templar from Skyverse x Unknown from CodeSphere/RestTale)
If you're curious about these two, feel free to check out the Tumblr page linked down below. Both blogs are relatively new and still active.
Templar: https://www.tumblr.com/templarskyverse?source=share
Unknown: https://www.tumblr.com/resttaleau?source=shareHopefully the link works
-
Don't bear the weight of the world alone by SkyWatcher3
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
10 Nov 2025
Tags
Summary
After her fight with Clover in New Home, Ceroba, in the middle of rethinking her entire life, chooses to save one child's life, and the consequences of her decision changes the fate of the entire Underground forever.
-
Ship Children asks and dares by iamauthor979
Fandoms: Murder Drones (Web Series), The Amazing Digital Circus (Web Series), Undertale (Video Game), Incredibox (Video Game)
10 Nov 2025
Tags
Summary
A fic where you can ask any of my ship kids questions and dare them to do things. 100% SFW because every ship kid's a minor.
TADC and Murder Drones are there from the start. If you're here for the Undertale AU, skip to Chapter 31. If you're here for Sprunki, skip to chapter 82.
Series
- Part 3 of My TADC Ship Children and their Journey
- Part 1 of Ace's life story (Nuzi ship kid)
-
Tags
Summary
Spanning over ten years, this huge fic will be split into ten parts for each year.
This fic is Alphynecentric, with Alphys at the helm. This is a fic that came outta nowhere (as they all do) and hasn't quit since I started. I have no idea where this will go. All I know is that it is very emotional, romantic, and rather silly.
Just enjoy. This may be my last fic for this fandom.
Series
- Part 1 of Ten Years
-
Tags
Summary
Nightmare frets over the soon arrival of his daughter.