Mystery

Reads 4,147
Votes 217
Parts 32
Time 1h 32m

Reads 4,147
Votes 217
Parts 32
Time 1h 32m

alphys frisk ocriverperson papyrus riverperson riverpersonxgaster sans skeletonfamily undertale undyne

Nobody knows who the Riverperson is... nobody but a single Skeleton erased from space and time. So when he's pulled out of the Void, what secrets will be told? What is the mystery behind the Riverperson and the Skeleton family?All Rights Reserved

alphys frisk ocriverperson papyrus riverperson riverpersonxgaster sans skeletonfamily undertale undyne

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32 parts

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Remaster on my page - check it out! Sans has had an interesting past. A past that even his beloved brother barely even knows of. A past that he wishes could remain a secret. But when the questions start being asked, what does he do? These questions seem so little, yet they cause so much to happen. One little question. "Who is ??????" can change so much. A chain reaction from a single sentence can cause an entire world to crumble. Or maybe two. This is my first book so dont expect anything great. Inspirations: The "Better Times" trilogy by: @ANinnyMouse42 "Royal Blue" by: @dealialestine Started: 24th May 2021 Finished: 29th December 2021 A full 7 months of great fun with this book! Cover art by someone? I couldn't find the original owner :( Undertale by Toby Fox

[SPOILERS] Undertale Genocide: A Bad Time (Sans' Perspective) [[Completed]] by TheDiabolicalOval

Sans the skeleton is a resident of Snowdin in the Underground, and life as he knows is mostly alright. He had his optimistic, egotistical brother, Papyrus, his mysterious friend in the RUINs, Grillby, the bartender at his favorite place to stay, and many other buddies and acquaintances he'd made over time. But one day, when the friend from the RUINs makes a strange request of Sans, he couldn't help but give her his word and make a promise. However... When he sees the subject of his promise exit the RUINs- A strange, wayward, dust-covered human- Sans questioned whether he'd be able to stay true to his word. (Feel free to leave suggestions for other stories you'd like me to write in the comments! None of the art featured here is mine.) UPDATE: Uh, so, my headcanons have changed quite a bit from when I wrote this, including Sans' attitude at some points, the Mettaton NEO situation, the Alphys evacuation, and other things. Well, enjoy an inaccurate, probably cringy story! I hope you like it anyhow.

Finally. They made it to the surface. But after an attack on the monster king, Undyne reveals a hidden secret that destroys the group. Can they bring themselves back together, or will their friendship break even more. (I suck at writing descriptions [~_~] )

[Sansxreader] A Whole New World *UNDERREVISION* by Mousington

UNDER REVISION (Check out Memories!) BTW- Sans is human in this. The story will explain. He has a sister named Chelsea and he is your "cousin".This story contains legal age drinking, a hint of suicide and might have a lemon if I decide to write one. Idek (Future me here, fyi- I'm not writing a lemon EVER in my defense I didn't know what they were but my friend said to put that soooo....) [^well variety IS the spice of life soooo };) I might...] ENJOY

*WARNING* Undertale spoilers!!!! I'm trying to keep in character as much as possible, but I'm human and they will be a little off at some point or another. It's supposed to be innocent, so things won't get too deep in terms of romance. No, there's no Papyton or Sansriel. The only pairing is the canon Alphdyne and Asriel (asgore/toriel[I have hope])

(DISCONTINUED) Where Were You? (UnderTaleXFNAF) (SansXReader) by 12DawnLight21

You are (Y/N), a tortured/abused girl who ran away from home bearing a terrifying secret. After falling into the King's Castle, you meet Sans, Papyrus, and their father W. D. Gaster. One year after staying with them, you suddenly disappear. Will you ever get to see your 'family' again, or will you fall under the influence of your terrifying 'secret'?

Bloodfall (An Undertale AU) by BlackStormWolf

Ever since the death of his younger brother. Things have gone downhill in the surface world for Sans. Alphys died a few months after Papyrus to a disease, Mettaton and Undyne, especially Undyne, had fallen into a depression. Flowey dissapeared into mt. Ebott, not to be found and Sans is fighting depression and insanity. One day, Sans discovers a suspect to his brother's death. A being that is trapping anyone who had either fallen into Mt. Ebott or stayed behind in snowdin for a while. Sans, along with Frisk and Undyne, go into the underground themselves to confront this being. They must encounter the Bloodfall that traps and kills anyone who dares pass by waterfall. (This takes place after a true pacifist run if one killed Sans in a Genocide run, but reset their game before getting to Asgore(I did this in a way to quit the Genocide route). This is if Frisk choses to do this the Pacifist way. I might make a Genocide one in Story Shorts. Also, My Sans is a human, but feel free to interprate him as a Skeleton if you ever choose to use this AU. Just credit me!)

Part 2 to Plumetale. Or should I say. Another run. Due to Frisk being Soul Poisoned. A purified Chara resets the world to avoid Frisks permanent death. Unfortunately, the only ones who know about the reset are Sans, The River Person and The Man Who Speaks With Hands. Frisk can't remember much from their previous pacifist run except for the love of her friends. Will they be able to save them? (Still a placeholder cover, lmao)

Timelines (A Doctor Who/Undertale crossover) by introverted-actress

What happens when a human gets tired of resets? When the thrill of a genocide route becomes boring and mundane? This is exactly what happens to Frisk. They spent so much time going through reset after reset that now they are growing tired of it. However, little do they know that their next timeline will be one of the most interesting they've ever had. When Frisk resets after an incomplete genocide, it captures the attention of a certain alien Timelord called The Doctor. He has to travel between dimensions to investigate this strange anomaly, but ends up with an adventure much more strange than he had initially anticipated. This timeline is breaking. The entire reality is being torn apart and it's up to Frisk, Sans, and The Doctor to stop it. (Disclaimer: I do not own Doctor Who or Undertale. The only thing I own is the plot line and the writing.) Cover art by @GodOfChaos3900

A Strange Feeling (Sans X Reader) by Sak423

Do not expect consistent updates as life gets busy 🙃. This is rated mature because of strong language. You are a 24 year-old in college and have loved Undertale since the beginning. You enjoy all the aspects of the game; the story, the lore, the music, the backgrounds, and most importantly the characters. You've started having a strange, almost malicious feeling related to the Genocide run and that creeps you out. So, you start a pacifist run and after a while, you fall asleep. You wake up in Undertale and thus begin your new journey. Through your travels, the strange feeling comes back, but as a different emotion. Perhaps the only one that can help you with this feeling, is a certain punny skeleton. (I tried my best I'm not very good at summaries 🥲.) (Also I am so sorry for the kinda weird writing this is my first time writing a story. So I welcome constructive criticism.) Started: January 26, 2025 Ended: ???

Undertale:Secrets

Remaster on my page - check it out! Sans has had an interesting past. A past that even his beloved brother barely even knows of. A past that he wishes could remain a secret. But when the questions start being asked, what does he do? These questions seem so little, yet they cause so much to happen. One little question. "Who is ??????" can change so much. A chain reaction from a single sentence can cause an entire world to crumble. Or maybe two. This is my first book so dont expect anything great. Inspirations: The "Better Times" trilogy by: @ANinnyMouse42 "Royal Blue" by: @dealialestine Started: 24th May 2021 Finished: 29th December 2021 A full 7 months of great fun with this book! Cover art by someone? I couldn't find the original owner :( Undertale by Toby Fox

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