Under-Code
- Reads 54
- Votes 2
- Parts 2
Ongoing17m
Last published Tue, Feb 24, 2026
what would happen if sans somehow managed to break the game and a new human had to navigate this broken world?
All Rights Reserved
#215
undyne
Join the largest storytelling communityGet personalized story recommendations, save your favourites to your library, and comment and vote to grow your community.
You may also like
Broken Timelines ✔️
I WROTE THIS WHEN I WAS 15/16 I'M REALLY SORRY LADS Chara is stuck in a spiral of Evil. Sans and Frisk are happily living on the Surface. The LOVE is gone, and replaced with love. All Gaster needs to do is interfere with a moment.Complete![Don't Forget [Sans x Female Reader]](https://img.wattpad.com/cover/364086490-256-k518017.jpg)
Don't Forget [Sans x Female Reader]
You would think that with how shit your luck is, you would've been dead day one since falling into the Underground filled with scary monsters and a few spooky skeletons. However, much to your surprise, that did not happen (yet). You know how you ended up here, but you don't know... HOW. You're actually in the GAME Undertale now. And to make matters worse, there are some people who KNOW. You're surviving the best you can, but things are only going to get weirder from here on out. Gaster apparently needs your help? You're using the DJ to go to different AU's? You are gay now?- Okay, maybe that last one is just a joke, but still! You can only hope that your instincts are enough to keep you alive in these trenches. On God, they tryin' to drown you in this hoe! {Available on Patreon, Quotev, and Ao3 under GabrielXander}
Everything Goes Black - Undertale Chara X Frisk
What happens if Chara got woken up when Frisk fell? What if Chara joins Frisk on their journey? What happens when Frisk starts killing? What will happen to Chara?
Another Tale
what if Asgore and Toriel part on good terms after his delcaration of war? what if Flowey did not turn evil by the time Frisk came into the underground ? what if Papyrus was more willing to fight and more able to dodge (..without still knowing what capturing a human would do)? what if Sans still did not find about "the anomoly" due to Flowey's lesser amounts of resets? and more small things a "what if" type of story for all to see
The True Timeline
If you haven't read the other one, that's okay! This is mainly to fix timeline problems and mistakes on my part that don't make sense!
Saving Them (an Undertale fanfiction)
The barrier is broken, monsters and humans are living in peace, everyone is happy except for one person. Frisk has been getting waking nightmares about not saving Asriel. They want to save him to erase all guilt and to be with their friend. But Asriel isn't the only one that needs to be saved. Something, someone lurks inside Frisk's soul. Someone deadly and has a hunger for power, and can kill anyone they want. A/N Frisk and Chara are both gender ambiguous in this story. Also there will be a little bit of Frisk x Asriel in this story, but this is not a Frisk x Asriel fanfiction. Credit to @karinacat59 for the cover. Undertale belongs to Toby Fox and none of the characters are mine.Complete
Underborn
What if Undertale suffered a major glitch? Like you were glitched into the game serious? What if you were able to change the hearts of the citizens of this now twisted world? Which will you choose... Fight or Spare?
Broken Souls
Bringing people back into existence doesn't generally have negative repercussions. Not for an entire world at least. So why don't we use the same idea for an all powerful entity and see what happens? Unfortunately, this world might not be up to the challenge. ---- What's this? An Undertale fanfiction? Yes, that's exactly what it is. This takes place after a True Pacifist route so spoilers if you haven't played it (which you totally should, go play now!) Currently being edited...Complete
What Went Wrong?
~'Disclaimer: This story has a lot of profanity and covers some very very intense or touchy subjects that may disturb some readers. You have been warned.'~ ((Unedited)) After Chara fell into the Underground, they met Asriel a monster inhabitant of the Underground. Soon after that, Chara joins a new family, but their ambition to keep everyone happy goes a little overboard and Chara is flung into a reality of destruction and hopeless wonder. Then many long years later they meet the beloved Frisk, who fell into the Underground, similar to themselves. Eventually everything Chara thought they knew correctly is turned upside down and they as a person are changed forever. ~'The game Undertale belongs to Toby Fox and some of the dialogue is ripped straight from the game itself, too.'~Complete
Undertale in Among Us
What if our favorite Undertale characters were in the world of Among Us? Read along as the imposter, Frisk, tries to sabotage and kill everyone. Each area of the ship represents an area in the underground and nine of our favorite characters (plus added ghosts) will have to finish their tasks and root out any imposters in their midst. Will sans finally stop being a lazybones and finish his tasks? Will Undyne stop the imposter in their tracks? Will Mettaton ever stop accusing monsters that he knows are innocent? Read along to find out!Complete
I WROTE THIS WHEN I WAS 15/16 I'M REALLY SORRY LADS Chara is stuck in a spiral of Evil. Sans and Frisk are happily living on the Surface. The LOVE is gone, and replaced with love. All Gaster needs to do is interfere with a moment.
More detailsContent Guidelines