Favorite Undertale Fanfictions
6 stories
Knock Knock {A Sans X Reader - Undertale} by LittleFluffyAlpaca
LittleFluffyAlpaca
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You were always a curious child. One day, your curiosity took you too far. You lived not to far from a mountain, MT. Ebott, and always wanted to see what was on the top. Your parents had told you stories about the mountain and you had always wanted to see if they were true, being the naïve child you were. One day, you reached the top after a while of climbing. You looked around, not realising where you were walking and fell into a gaping black hole. You woke up to a soft voice of a goat-like monster who, ever since that moment, took care of you and loved you. She taught you magic and all sorts of recipes. Everything she knew and you loved it. But what happens when you grow up more?
Bonerable (Gaster!Sans X Reader) by MartiNikx
MartiNikx
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The barrier was lifted, the monsters were free but not accepted; hell broke loose, the wars were resumed. The monsters had no choice but to retaliate to the human's advances. Resources were scarce, the earth seemed unhabitable and the only way to survive was through violence. You lost all hope when you were forced to comply to such vile doings; being left alone by your family loosing them to a friendly fire during an escape. You were all alone; until he came along. ☆Violence, Cursing, Sexual Themes☆ ☆Gender-Neutral Reader☆ ☆Slowburn☆
Sans X Reader ~ Restarted Memories by Geekgamergirl101
Geekgamergirl101
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(Y/N) was a monster, no mistake about that. Well, actually, a lot of other monsters thought she was a human. After all, she did look human. Yet, she was able to convince.... most of the monsters that she was in fact, one of them. A few of them still would mistake her for one and one monster, in particular, wouldn't stop trying to 'hunt her down so that she could be taken to the capital'. Still, (Y/N) loved "Home", as she belonged there much more than she belonged to the human world. Yet, ever since Frisk, the Fallen Human, showed up, things started to act strange. It felt as her memory had been... "restarted" and she was going through the same thing over and over. Not only that, but Sans started to act strange... and she was determined to figure out why.
Cryophobia - (Sans x Reader) by trainerblueoak
trainerblueoak
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    Parts 24
Next person to comment on this monstrosity gets fucking vored!! × ❝You made your choice a long time ago.❞
Gifted Undertale Fanfic by xbutterfly_walkerXx
xbutterfly_walkerXx
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Sans, The son of Gaster the Royal Scientist. A gifted boy who must find a away to accept the absence of a father and given the Underworlds fate by his fathers crypted messages through a strange and confusing alphabet. Sans must decide is it worth bringing back his father but putting the fate of the underground in jeporday. Or will he save everyone else and let his father rest behind?
Soul An Undertale Fan Fiction by karikitdemon
karikitdemon
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In the Undertale universe, a different human child falls down into the underground. Even though she is very young she will have to find her way home or stay there forever. ----- Big thanks to my friend from school who helped me out a bit.