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Into The Game >> (Sans X Reader) Undertale FanFiction

Reads 224,207
Votes 9,005
Parts 23
Time 2h 1m

Reads 224,207
Votes 9,005
Parts 23
Time 2h 1m

Mature

chara determination fanfiction flowey frisk game genocide intothegame mercy nightmares pacifist papyrus reset sans sansxreader soul texttospeech timeline toriel undertale xreader

It was just a normal Saturday. (Y/N) was playing Undertale for the millionth time. She was obsessed. (Y/N) had played all of the routes. True Pacifist, No Mercy/Genocide, Neutral. She experimented with killing certain characters doing different things. 

Then, as (Y/N) started a new game, she felt a falling sensation, as if she just fell out of her chair. She blacked out soon after. When she woke up, she was lying on a bed of golden flowers. 

She knew this place. (Y/N) was in the game. She had taken the place of Frisk and was in the Underground. 



•Disclaimer I do not own Undertale. It belongs to Toby Fox. I do not own you. You own yourself. I do not own the cover or any of the pictures that will show up in this book•

*If you're reading this as a guy please just change the pronouns to he/him/his. I find if a lot easier to just put female pronouns. Thanks! :3 *All Rights Reserved

chara determination fanfiction flowey frisk game genocide intothegame mercy nightmares pacifist papyrus reset sans sansxreader soul texttospeech timeline toriel undertale xreader

23 parts

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Overworld: After the Fall - Book One by SunnyBunnyDawning

Seven years after falling into Mount Ebott, the final human is finally entering the next stage of life, junior year of high school. Along with the princes and some close friends, she plans to protect her family from the still harsh world outside the mountain and hone her magic. **I DO NOT OWN UNDERTALE OR ANY AUS MENTIONED IN THIS STORY! ALL CHANGES TO ANY CANON CHARACTERS ARE OF MY OWN ACCORD AND HAVE NOTHING TO DO WITH THE ACTUAL GAME! THIS IS PURELY MY TAKE ON WHAT HAPPENS AFTER THE END OF A TRUE PACIFIST RUN OF THE GAME! THANK YOU** WARNINGS - CURSING - MENTIONS OF DEPRESSION - MENTIONS OF DID - MENTIONS OF SELF-HARM

All The Dead (Chara X Reader) by Shxnxng_Stxr

"Psychotic tendencies..." As a child, Y/n L/n had a good life. She was always complimented for her h/c hair and e/c eyes. She had a loving little sister and a caring mom and good friends. So, if she had the perfect life, why did she throw herself into Mt. Ebott? When Y/n awoke in the Underground she immediately noticed how much nicer the monster's are. They all brought a smile to her face and she felt at home. Toriel was always a mom to her, Sans and Papyrus were brother's, and Frisk was her best friend. She couldn't have ever wanted more. So, why did she kill all of them? Her and Chara had killed everyone more times than countable together. Chara was happy they found someone they could connect with, and Y/n was happy someone accepted the fact that she was a killer. They got along perfectly, the best of friends! Murders, of course, but still best friends. And they were always just friends. Right?

LOVE (MINE Book 2) by xxAnnieSan

The past is in the past. You've gotten over what has happened, and you're looking towards the future. However, something happens you didn't expect. There is a girl that wants to die. She runs away from home to kill herself. This girl decided the only way to die is to fall down into the Underground at Mt. Ebott and be 'eaten' by Monsters. A patch of golden flowers break her fall. ... Depending on what path you chose in the past... That girl's SOUL will change, for better or worse. ~~~Disclaimer: I don't own those (MULTIPLE) pictures used in the Cover. If you have a problem with the Cover, just ask me to change it.

Into Hell - Book Two of Into The Game >> (Sans X Reader) by Melody4164

(Y/N) is finally ready to go back to the monsters she holds so dearly. After about a year of mental and physical training she has finally gotten her emotions under control. But has she gone emotionless? After plugging the thumb drive with her save file on it into her computer, (Y/N) soon discovers something. In a desperate attempt to save themselves, or maybe just a way of revenge, Chara corrupted the save file. Now, all the monsters that (Y/N) befriended are out to kill her. Can (Y/N) survive? Will she defeat Chara and find a way to get her friends back to normal? Or will she instead join Chara and erase everything? Find out in Into Hell. Once again I'm making the gender pronouns she because it makes it so much easier to write, which means quicker updates. I'm really sorry if your a male.

We are one and the same by PegasusYT

After a failed genocide attempt Frisk discovers that she has a second personality who is hellbent on killing everyone, Chara. Frisk slowly tries to come to terms with this as she lives in the world she created via the true pacifist route. Will she come to terms with this potential second personality who is nothing like her?

Undertale Determination by StorageLibrary

Casted out by their village and fallen into the depths of the Underground, Frisk has to get quickly used to the fact that they not only have to survive against monsters, but also have to figure out who that Ghost Chara is, that helps them through the darkness of the unfamiliar world... WARNING: PUNS AND JOKES AHEAD!! AND SOME VIOLENCE, cause this is Undertale! If you hated Sans puns, you will hate this story even more. And yes dear readers, your soul will be in shambles. GET IT?? Cause with determination it splits apart! Haha...hah...

UnderAsriel by FatalityWanes

Chara has one objective: RESET back to when they themself fell, and save Asriel from his demise. With all the Genocide Runs the now-free Frisk goes on for them, they're able to amass a big enough collection of SOULs to do exactly that. The only problem is, Asriel remembers everything that happened when he was Flowey. And he isn't too happy about it... In this new timeline, Kelsa, the SOUL of Bravery, falls into the Underground shortly after Frisk. Determined to save her only friend, Kel teams up with a mysterious flower with a face to find them and rescue them from Asriel's notorious freezing chambers. Betrayed by many, and uncertain who to trust, Kel finds herself in the midst of an iron-fist dictatorship, fighting to restore the Underground to the peaceful place it used to be. But... all is not as it seems, and there may be things about Frisk that Kel will wish she'd never discovered... Cover art by yours truly :3 This story takes place after the events of Underhappened. You may wish to read that first if you haven't already :D

Judgement Hall • ~• Sans x Reader by WildAnimal999

#40- TobyFox 12-8-18 #1 JudgementHall 3-21-19 Discontinued. I stood before Sans, he'd fallen asleep. Tears were dripping down my face as I held the knife high above my head.My hand was shaking, I didn't want to kill him, I never wanted to kill anyone, but Chara, that brat, she'd killed everyone, not me. And just before Sans fell asleep, she left my body and I was sucked in. She wanted ME to KILL SANS. At this point, my whole body was shaking. I could hear Chara saying, "Come on, Y.N, kill that smiley ol' trash bag. He's nothing compared to US. NOBODY CAN STOP US NOW!!!! LETS END THIS, HERE AND-""NO!!!!!" I screamed in rage. Sans still didnt wake up. This starts off as a genocide run but then blossoms into so much more. I dont own the cover or any of the Undertale characters, thoose belong to Toby Fox, the creator of Undertale.

Hungry Love (Horror Sans x Reader ) by YandereEmo

In the midst of Tokyo's bustling streets, you led a life that appeared ordinary, despite your role as a leader in a prominent gang. Yet, beneath the façade of normalcy, you carried the weight of profound loss-your mother, your father, your brother-all taken from you, leaving behind a void that seemed impossible to fill. Determined to shield yourself from further heartache, you resolved to protect the one remaining person you held dear: Frisk. Their presence brought light into your shadowed existence, offering a glimmer of hope amidst the darkness of your past. But fate had other plans. The dissolution of your gang shattered the fragile stability you had built, leaving you adrift in a world that suddenly seemed hostile and unfamiliar. Yet, in the aftermath of this upheaval, you found solace in Frisk's unwavering companionship, their presence a beacon of comfort in a sea of uncertainty. Then, in a cruel twist of fate, you lost Frisk. Cast into the unfathomable depths of the underground, your path collided with Aliza's, a chance encounter marked by the ominous presence of Horror Sans. Emerging from the shadows, his hollow eye sockets bore into your soul, his grin sending shivers down your spine-a chilling reminder of the darkness that lurked within the depths of the unknown. With each loss, the world seemed to grow colder, more indifferent to your struggles. Yet, amidst the despair and desolation, a glimmer of resilience flickered within you, a quiet determination to reclaim what had been taken from you, no matter the cost.

Demons Love [Underfell Sans x Demon-Reader] by Unicorn_queen808

Y/N is a half Demon Half Human, who lives with her friend Amy. They moved to a little town recently where Amy has loads of friends, which is the reason both of u moved there. Now... Only Amy knows ur little secret about u being half demon. Also ur the type of gurl who is kinds shy sometimes, has MAJOR ANGER ISSUES if u get really pissed off, and ur extremely....hyper. ANYWAYS.... u meet Sans and somehow get off at a really bad start, then u too start to get used to each other then, blah! Just a little hint, this is my first x reader thang, so wish me luck! YASS IM SO AMAZING!!!!! Srry got lazy to write down details in here! But I will explain later in le story!!! Also, if u are nothing like the gurl I just described, then u should still read it cause can!!! I CONTROL UR LIFE IN THIS STORY!!! MUAHAHAHA......Alright buh bye! Edit 2019: This story is so cringey, I wasnt able to read my story without crying and dying of cringe XD, thx to all the people who read it over these past two years lol, hope you enjoy! One more thing, I highly suggest you dont read this story unless you're willing to die of cringe. Like seriously, this story is just. . . . terrible (in my opinion) Have fun

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Slide 1 of 10

Overworld: After the Fall - Book One cover

All The Dead (Chara X Reader) cover

LOVE (MINE Book 2) cover

Into Hell - Book Two of Into The Game >> (Sans X Reader) cover

We are one and the same cover

Undertale Determination cover

UnderAsriel cover

Judgement Hall • ~• Sans x Reader cover

Hungry Love (Horror Sans x Reader ) cover

Demons Love [Underfell Sans x Demon-Reader] cover

Overworld: After the Fall - Book One

Seven years after falling into Mount Ebott, the final human is finally entering the next stage of life, junior year of high school. Along with the princes and some close friends, she plans to protect her family from the still harsh world outside the mountain and hone her magic. I DO NOT OWN UNDERTALE OR ANY AUS MENTIONED IN THIS STORY! ALL CHANGES TO ANY CANON CHARACTERS ARE OF MY OWN ACCORD AND HAVE NOTHING TO DO WITH THE ACTUAL GAME! THIS IS PURELY MY TAKE ON WHAT HAPPENS AFTER THE END OF A TRUE PACIFIST RUN OF THE GAME! THANK YOU WARNINGS - CURSING - MENTIONS OF DEPRESSION - MENTIONS OF DID - MENTIONS OF SELF-HARM