Undertale+Aus
13 stories
giant Naga Sans X girl reader by nagasansxlil
nagasansxlil
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your mother despises naga's because your father was killed by one. in the forest you meet a giant Naga that might want to kill you. his name is Sans. he is half skeleton half cobra. you don't know if you're falling for him literally and figuratively. I am bad at story descriptions 😁
(Sans x Reader) When Two Souls Meet by ZanaBSparrows
ZanaBSparrows
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Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over and over again. Sometimes, he'd even done the killing himself. And no one ever remembers. Not even the kid herself. It's an exhausting cycle, one that never seems to end. But there's something different about this run. Another human's fallen down... the kid's sister. Please note the the story is primarily on Quotev, so updates to Wattpad may be late, or lag behind that of Quotev. The story also has the potential to become mature. (I haven't decided yet.)
When Two Fates Intertwine (Sans x Reader) by ZanaBSparrows
ZanaBSparrows
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[THIS IS A SEQUEL TO MY OTHER FANFIC "WHEN TWO SOULS MEET!" If you haven't read it, I would highly suggest it--the story won't make much sense otherwise.] Sans has finally found someone he can trust--Frisk's sister, the eighth fallen human. After months of step-siding and awkward interactions, the two are finally a couple. Things are finally falling into place--there are no more resets, and Chara and Flowey have been a lot more quiet in the last few months. But things can't stay this way... can they?
A Feral Tale by UnderLust_Sins
UnderLust_Sins
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Amy is running through Ebott Forest, located under Mount Ebott, trying desperately to escape her abusive Uncle when she falls through a hole in the mountainside, and into the Underground. What will happen when she finds the old legends of Monsters having been locked Underground centuries ago...are true? And what happens when they've gone Feral from their centuries Underground...
The Unbeliever And The Giant (DISCONTINUED) by cold_heart_2_3
cold_heart_2_3
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(Sorry,but this story is discontinued until further notice,and I'm really really sorry.) (My attempt at a continuous story for g/t. Also,I don't own the picture above) I had always laughed in the face of those crazy enough to yell about a strange thing in the woods,no,they don't scream of a murderer,they don't rave about a wild beast,heck,not even a ghostly spirit,they rant about the most insane of things,most being of one giant,all stories,however the giant described,in the ramblings of madmen. So,when I'm thrown out for accused murder,what else do I have to fear aside from travellers of the woods?
Heads Or Tails ( HissyTale / Naga Papyrus x Reader) by HorrorSwapSans
HorrorSwapSans
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"Human, you don't have to leave. You can stay here with me! I'll make sure to care for your every need, just. .don't go. You wouldn't want me to use-. . . You leave me no choice." What do you do when you've found yourself in a pile of coils belonging to a skeleton? Will you take a chance and flip the coin?
All Alone (Giant Sans x OC Reader) (HIATUS) by -Centaurea-Cyanus-
-Centaurea-Cyanus-
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You're tiny, maybe around the size of a large mouse, and you've been separated from your family, except for your older sister. Then, she's taken away from you and you are filled with BRAVERY, JUSTICE, INTEGRITY, PATIENCE, PERSEVERANCE, KINDNESS, and, most of all, DETERMINATION. Will you ever find your sister? Don't forget to check out my other stories! That's all I have for right now. Skylor out!
The beasts underground by Icewizard0140
Icewizard0140
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Zachary ran and ran until his legs could bare it no longer. He could see the light emitting from flashlights in the distance. He was not a murderer, he was wrongly accused. He runs up to the top of Mount Ebbot, and jumps. Cover is not mine. I also got permission from UnderLust_Sins to use her idea.
(Underfell sans x reader (female)) UNDERCOVER by moon1767
moon1767
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You're a human that has fallen into Mt. Ebott on the year where all humans dress as monsters...Halloween. So how will the monsters know if you're a human or not?
Corruption (OLD) by ParadoxicStars
ParadoxicStars
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You died. Again. But, when you woke up... You were back at the beginning. You didn't reset... but something was off. Flowey seemed skittish, frightened even. He was KIND. The people you knew, you once held dear... CHANGED. The entire underground was different... Dark. Nobody seemed to recognize you, but a part of them still remained. Someone who just wanted a friend, to be looked up to, respected... And another who just wanted hope-who was tired of this game... You're left with two choices: Will you kill to survive, or will you die befriending them all over again? Authors Note: This is in the AU Underfell. I recommend looking into it, it's simply amazing to me! Long story short, the "you" mentioned there is Frisk but it was a good description for the AU I found once. This is basically, somewhere the save file got corrupted, and now everything is reversed except Frisk. Hope you enjoy! Disclaimer: I do not own Undertale.