Undertale
22 stories
Undertale react by Frostygamer234
Frostygamer234
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    Parts 26
I have kidnapped the whole undertale squad and am making them react. Have fun
Undertale/Transformers crossovers by ANinnyMouse42
ANinnyMouse42
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I fangirl over Undertale. My sister is a member of the Transformers fandom. We wrote a crossover fic together. And then we wrote another one. And now we're writing more. I mean, giant alien robots meet decades-imprisoned Magical monsters. What could go wrong?
Undertale Meets Underswap (Skelebros!) by imagine_write_dream
imagine_write_dream
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There are not enough of these out there. So, I decided to make one myself. Undertale sans and papyrus meet Underswap sans and papyrus. I do not own the cover art or Undertale. In here Frisk will be a girl. But if you want, change the Frisk parts of she to he. What happens when Underswap sans and papyrus are brought into Undertale? Find out. Also I really enjoy writing this story! ^.^ At first I was just going to have them have a quick chat, but then I wanted to develop a whole plot to this! Updates about every week or so.
Beneath the Stars (AU of an AU...?) by ANinnyMouse42
ANinnyMouse42
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    Parts 9
Alternate universe for my Undertale series "The Better Times" (The Time Before/A Name to Remember/No One is Happy with This) where Firhaur survived! I recommend having read TTB and ANtR all the way through, and at least to chapter 64 of NOiHwT before starting this. (I feel too lazy to draw a proper cover. If you're interested in drawing one for me (needs to be digital art), go ahead and message me for details! (I can't guarantee I'll use your cover...!)) Cover by @PeridotCipher
What's The Point? by CryaoticWolf
CryaoticWolf
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    Parts 6
Reset after reset, all Sans wanted was to kill the human to protect his friends and family. With a new arrival in the underground Sans had a very important choice to make. Kill the human without knowing their intentions or spare them and see if their promise of saving the monsters was true?
Possession by antisocialworm13
antisocialworm13
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    Parts 21
I don't know how much longer I can go on. It came so suddenly, during a time when I had least expected. And now...I don't know if I will be able to escape. Vines wrap around the sleeves of my blue hoodie, causing me to give up any and all control. They continue down my body and to the ends of my legs, making my steps copy and unnatural. As they move me forward, I do everything in my control to go back. "Quit it trash bag!" The voice that is literally in my head screams. I fight even more. They can't hold onto control forever, can they? I try to speak, but vines around my neck prevent me from doing anything too risky. It wouldn't take much for a soulless flower to decide that he's done with me as his puppet. I never liked being responsible for too much. Even when I had to take care of Papyrus, I knew that all I had to do was keep him happy. And then we would be fine. But anything else, like becoming the Royal Judge, made me feel as if I was adding another string for the puppeteer to control. And that never sat well with me. But now... I have no control over anything. [Artwork is not mine, I have the art skills of a rock] [#1 floweytheflower]
Shattered by AlphaWolf1107
AlphaWolf1107
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    Parts 10
Sans the Skeleton is full of mystery. So what happens when Papy, along with all of his friends, notice something off about the pun-loving skelebro? At the sight of a scarf, the others are clued in that their friend may not be as okay as they thought. So when the Human offers to help get him to reveal what's going on inside that skull of his, the Gang accepts, and secrets are revealed. It what happens when the Gang finds out that Sans isn't just 'Not Okay' but Shattered?
"Baby Bones" An Undertale Fanfic by Silver1212
Silver1212
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Sans has a good life. A caring father, an adorable baby brother. Things couldn't have looked better. But soon after the two started school in snowdin with the other monsters instead of being home schooled, disaster strikes. Will Sans be able to get through this newfound relization unscathed? This story goes by the theory that gaster is the father of papyrus and sans. Though the theory is incomplete since no one knows who the mother is. For all we know sans and papyrus could have been made in Gaster ' s lab since they just "appeared one day" No one really knows, but it's fun to debate about. Enjoy
The Smiling Hero (My Hero Acidamiea x Male Sans Reader) by The_Smiling_HeroSans
The_Smiling_HeroSans
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Basically it's Sans from Undertale in MHA. I do not own Undertale, My Hero Acidamiea, or any of the photos and videos I use in this story. Undertale is owned by Toby Fox. My Hero Acidamiea is owned by Shueisha and Viz Media. Photos and videos are owned by their respective owners.
【• 𝐏𝐨𝐢𝐧𝐭𝐥𝐞𝐬𝐬 •】-𝑨𝒏 𝒖𝒏𝒅𝒆𝒓𝒕𝒂𝒍𝒆 𝒇𝒂𝒏𝒇𝒊𝒄- by Syst3m_Err0r
Syst3m_Err0r
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(Currently under revision and editing) A story about classics journey through the multiverse (and his own mental state) that doesn't have any relation to Underverse.