1 - 20 of 483 Works in Reader is not Frisk or Chara (Undertale)
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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.
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You had been playing an immersive VR game: The World Of Aspenheim. However, after 10 years, the servers were about to close and to give your last farewells, you decided to stay online until the servers kicked you out. In the end, you fell asleep on the golden throne...
Only to wake up still logged into the game!? And why couldn't you log out!? And who was the one knocking on the door!?
"YOUR HIGHNESS? ARE YOU AWAKE?"
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Being the cleric of an inter-dimentional war isn't that bad once you get used to it.
When a skeleton falls from a portal into your bedroom, rambling about things you'd always thought were fake, what would you do with everything he says? When he claims he needs to win a war against his very own brother, his bone and marrow, who are you to turn down his request to be his army's medic? When you realize you're falling ill, who are you to tell him something is wrong?
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Heat of the Moment by FandomWorld9728
Fandoms: Undertale (Video Game), Swapfell red - Fandom, Fellswap Gold - Fandom, Underswap - Fandom, Swapfell - Fandom
21 Nov 2025
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Being half demon and half human was hard. It affected your life in interesting and traumatic ways. Luckily for you, you had a pair of skeletons who would help you through whatever life threw your way. Only, things got more complicated when different versions of them began to show up.
Series
- Part 9 of Undertales Across the Multiverse
- Part 9 of Papyrus/Reader Fics
- Part 7 of Sans/Reader Fics
- Part 2 of Reader Inserts
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(I'm not good at summaries LMAO, please help me)
Monsters have been released from the Underground and flood into Ebott City. As it turns out, this might not be so bad. Thanks to the monsters, you have a stable job at Grillby's. You've even gained a few crushes on some regulars!... I mean... who said that?
But relationships with these cute skeletons might be put to the test. When the stress gets too heavy, you tend to go completely silent... Will they still love you when they find out about your silent meltdowns? -
⊹⋆The Stars were Made for Her⋆⊹ by Sam_xqr
Fandoms: Undertale (Video Game), Original Work
20 Nov 2025
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A falling star,
She was the star.Can our main character thrive through this new foreign land, or will she be washed away along with the effortless tides... only the future stars know.
(First fiction story ever, was going to make this an Undertale fic... But, I don't know, please give suggestions! :3 I will be doing a full reader POV first, then we will slide into the meeting of these fun Undertale characters!)
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A post-soulless-pacifist take where Chara takes over Frisk
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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?
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You’re young. You marry the wrong man.
You wish you were dead.
Be careful what you wish for, Seven.
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Or, you find yourself Underground surrounded by starving, tortured monsters who know you're the last soul needed to attempt to break the barrier again. You said you wanted to die. Don't back down now.
Series
- Part 8 of How To Be A Human Being
- Part 9 of I/Me/Myself
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It has always been your dream to rise in life, even though many said it was impossible for someone of your class. But something your soul truly longed for was a soulmate. Anyone who carries a heavy burden wishes for another soul to be their anchor, their motivation. However, it seems you weren’t born to have someone by your side forever.
And now just because they’ve now become your soulmates doesn’t mean they’ll take away everything you’ve worked so hard to achieve.
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Killer's trying to be all cute for some reason, but you just had the worst day at work and are not the most receptive to whatever sweet(?) mood switch he's having.
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When replaying Deltarune Chapters 3 and 4, Reader gets a strange update on their Switch.
Wacky shenanigans shall occur, and chocolate chip cookies shall be disrespected.
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Undertale Purple - Perseverance by AnonymousWriter08
Fandoms: OMORI (Video Game), Undertale (Video Game)
15 Nov 2025
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A long time ago... humans and monsters lived in harmony. Until war broke between the two races.
The humans were victorious and sealed monsterkind deep underground with a powerful spell, that could only be broken with the power of seven human souls.
This was the tale of Mt. Ebott, and the tale trascended into legend. Those who climbed the mountain, weren't seen again.
And so, begins the tale of the fifth human soul to fall into the land of legend, to fall... into the Underground.
This is the tale of the Purple Soul... Sunny Suzuki.
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Nothing. Something. Everything—all at once. by Anonymous
Fandoms: Undertale (Video Game)
14 Nov 2025
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You are in control of the reader — their choices, their memories, their fate. But don’t worry; nothing is ever truly final. You can always try again.
Just… be careful. Even broken minds can only take so much before they shatter for good.Stay Determined! ⁽⁽ଘ( ˊᵕˋ )ଓ⁾⁾
( This was supposed to be a Delta x reader but.. I'll do that another day! Updates may be slow since I want people to see this.. but I'm too excited so AAAAAAAA!!!!! )
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Your roommate is… weird.
He likes spaghetti and glitter (mixed together, preferably), has a penchant for speaking about himself in the third person, sets up puzzles in the hallway every weekend, and he has begrudgingly befriended your dog.
Also, he's kind of a superhero.
Series
- Part 1 of unnamed undertale superhero au
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After a little accident, Sans ends up with an unreliable connection to the internet on the surface. If anything, it's at least good for a bit of fun.
Or:
You bond with a random guy on the internet who leaves awful puns under your posts.
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You're a hermit. Meaning you basically never leave your home unless necessary.
One day, you come home from your bi-weekly shopping trip, when your neighbour tells you some exciting, yet worrying news:
Monsters are real?
Certainly they wouldn't come near you.Eventually, you find therapy, meaning you have to leave your home more.
But it's much to the delight of a certain skeleton who's laid his eyes on YOU. -
I'm Never Gonna Know You Now, But I'm Gonna Love You Anyhow by sweet_bellyache
Fandoms: Undertale (Video Game)
10 Nov 2025
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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.
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After endless resets and what feels like an eternity spent waiting, Sans no longer remembers how long he’s been alone or how many times he’s painted the Underground in dust.
The dust that never leaves his hands. The echoing voices that never stop.
When another human finally falls into the Underground, Sans expects the game to continue. But this one is different. Against his better judgment, he hesitates.
Mercy is a mistake he can’t afford.
Yet... -
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But despite everything, it’s just me. After waking up in a strange place after they died, this reincarnated soul soon finds out that they awakened in Undertale, a game they became briefly obsessed with two years previous.
On the path to an unknown future, life, death, friends, and dogs with mysterious glowing artifacts, are some of the things they find on the way
However, after their shocking second death in this new life, they wake to find themselves alive again, this time as a skeleton.
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Infrequent updates