Undertale (Mostly Sans)
18 stories
The Smell of Old Books (Sans/Reader) by thelittleglaceon
thelittleglaceon
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    Parts 38
The old bookstore wasn't your home anymore, you finally realized. It was with them. It was with him. (Sans (Undertale)/Reader. The story takes place in second person view. Reader is not Frisk!) (art is by @Elmer_Heiji on twitter)
My Soul? It's Yours. by arinjlocke
arinjlocke
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    Parts 26
You become a citizen in Snowdin due to being lost in the undergrounds. You had left Toriel and the ruins only to be greeted by someone you would've never thought to be so important, or essential, to your life. *warning: might get serious and have adult content in some parts also maybe some spoilers for both the pacifist and the genocyde routes.
C A N C E L { Sans X Reader } by Too_Many_Feelz
Too_Many_Feelz
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    Parts 27
How many times have you seen this world, how many resets does it take for you to give up hope? Does anything even matter after all this, does trying do anything? Will the struggle help at all, can I even believe in anyone anymore? The only thing keeping me going now is my resentment.
Let Me Run by SilentObserverWrites
SilentObserverWrites
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    Parts 67
It's been two years since the barrier was shattered... All was well until humanity's opinion and voices ruined it all. The war had begun. --------------- Although one girl had always seen the world as a sickening place... A majority of humanity was indeed contaminated, but she was one of the individuals who deserved the mercy of the monsters. From being abused and previously bullied (Y/N) had enough. She escaped her own home, only to be exposed into the havoc of the world. It made her sick. Highest rank: #16 in Fanfiction
All's Fair In Love And War Gaster!Sans X Reader by Emblem_of_Homestuck
Emblem_of_Homestuck
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    Parts 8
War amongst the humans and monsters has really messed things up for you. That is, until you meet a sexy skeleton. ((Note: this is a slow burn. You actually have the chance to fall in love instead of usual fanfic logic. Also reader is gender neutral))
BeyondTale; Replay (Book 2) by palestream
palestream
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    Parts 40
After the death of Frisk, Asriel, wracked with greif, reset the game. Oddly...since someone else pushed the button, not everyone lost their memories. And some are recovering older ones that leaves Frisk wondering who can be trusted.
Sans and Frisk (& Alex) by undertalestrash
undertalestrash
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    Parts 23
Frisk fell into the underground and met a skeleton named "Sans". He seems like a nice guy....(Also they have a baby and now it's kinda focused on her, and her name is Alex.) COMPLETED
Sans X Shy!Reader(LEMONS!!) by Undertale_Trash101
Undertale_Trash101
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    Parts 12
What happens when you fall down a dark hole in a dark cave? What would you do?
Bonerable (Gaster!Sans X Reader) by MartiNikx
MartiNikx
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    Parts 29
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☆
Cryophobia - (Sans x Reader) by trainerblueoak
trainerblueoak
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    Parts 24
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