Undertale sanses
198 stories
reborn as killer sans oh this will be fu- wait were mentally unstable  by Moonwolf_230
Moonwolf_230
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so I oh ways want to make a reborn as killer sans, but we're mentally unstable, of course, due to the rest and our past memories, which we can't remember what we were anyway! We know everything and everyone, so why not mess with them. This going to me fun!!!
Reborn as Dream Sans [Undertale Multiverse] by DeadEnDead
DeadEnDead
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Reborn as the guardian of positivity, you find yourself in a strange new world, uncertain of what it may hold. Navigating it isn't easy with gods like Nightmare and Error trying to strike you down every step of the way. But unlike the previous Dream, you have nothing to lose, and are determined to forge a better path than the soul whom you have replaced.
Goretober 2024 by namescape
namescape
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HERE WERE GO AGAIN ROUND TWO MOTHERFCK But with Blueberror/Swap Bc what better way to love my favorite character than to rip out his soul!! ‼️MASSIVE TRIGGER WARNING ‼️ ‼️THERE WILL BE CHARACTER DEATH‼️ ‼️AND SELF HARM ‼️ ‼️I DON'T KNOW WHERE THIS CAME FROM BUT YES‼️ ‼️BE WARNED‼️ ⭐️ Also prof reading is dead in these challenges so grammar and proper word placement is not guaranteed I gotchu 👉👉👉 1. Cannibalism 2. Sharp objects 3. Asphyxiation 4. Gut spill 5. Amputation 6. Bugs 7. Accident 8. Beaten/bruised 9. Torture 10. Masochist 11. Slasher 12. Burns 13. Sliced 14. Eyes 15. Self-inflicted 16. Decomposing 17. Too much Blood 18. Candy Gore 19. Bones 20. Impaled 21. Holes 22. Surgery 23. Vivisection 24. Teeth 25. Body Horror 26. Nosebleed 27. Stitches 28. Blunt force trauma 29. Disease 30. Vomit 31. Aftermath Art by @thestrongestjewel on Tumblr Underswap belongs to Popcornpr1nce Blueberrror belongs to Loverofpiggies -{POSTED Oct 1, 2024}- -{FINISHED Oct 31, 2024}- Next year will probably Nightmare w/ or w/out his lackeys 🏅 #3 in Blueberror Oct31, 2024 🥇 #1 in Goretober(2024) Oct 31, 2024
Killer's harem by Cl0uds1nth3sky
Cl0uds1nth3sky
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Inspired by: @multi_ship_join The cover art belong to their original artist All the characters in the story doesn't personally belong to me, only a few background characters are my ocs - Killer's life is pretty normal, not many bad or good things happens to him, but after a drunk one night stand at a party hosted by the school's wealthiest kids, Nightmare and Dream Joku. Although his life is still the same but now several suitors after him Warning: this book will have some topics such as drugs, and stuff like sex, if you don't feel comfortable then you're free to click out of this book
DISCONTINUED Gosh This is HORROR-ble (Reincarnated as Horrortale Sans)  by chipped-cup
chipped-cup
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A story where you, the reader, are reincarnated as horrortale sans, some things you still retain from your past life, like how anxious you are, and how you pretend to hate puns (you secretly love them). You're not sure what this new life has in store for you but nothing could compare to how bad your past life was... right? *WARNING* there WILL be blood and gore depicted, not exactly that detailed but be cautious if you get triggered by that. There will be NO sanscest or Fontcest! Horrortale does NOT belong to me. Cover art also does NOT belong to me it belongs to @_Asky_ on Twitter! My co-author is @vickyfox1243 go check them out! They're helped me with some ideas in the earlier chapters. Be prepared for bad grammar and bad spelling I am doing all of this on my phone so please don't expect to much. I try to update on Friday every week, but there will sometimes be weeks with two chapters up! because of incorrect quotes the narrator is SO unreliable, do not trust a single word that comes out of this insane guy's head theres no explicit pronouns most times, but most characters refer to reader as he/they
One Day, I'll Save Myself- Reincarnated as Sans by timefortale
timefortale
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You remember a life before war. A life lived in a body of flesh instead of porcelain bones. You look down at your little brother, little precious Papyrus, swaddled in green. You know then and there that in the first time since you were forcefully created and pulled into this strange vessel, there was something more precious than the stars themselves. And you love. And you fear. Because you'd even go against your SOUL to protect Papyrus, even if it meant selling yourself to the person you hate most. The lengths an older sister goes through to ensure her little brother survives the HP Hell that is a transcontinental war. Second Part: Three years after the end of the war, you've finally done almost everything you promised to do. Before you could fulfill the last promise you make, you and your brother, Papyrus gets forcibly displaced into an alternate universe. It's like a graveyard in here with all of these skeletons, and your previous life's mother was right when she told you to never leave a light on, unattended. Third Part: Getting a glimpse of hope in your efforts to return home, you and Clover discover the perils of rushing the process. It seems you are Odysseus, and home is a long ways away. But Odysseus didn't have to deal with SOUL-less parasites and alternate versions of himself that are a couple crackers short of common sense. You are... the ultimate mother hen. TLDR: OC (technically a reader-insert) gets reincarnated as Sans in wartime and wants very much off this ride. Will turn into a machine-induced universe travel fic, but you can just cut it off before that. Will use SHE/HER/HERS in terms of pronouns. A tribute to my older sister who has really gone through some stuff to keep us fed and loved. Disclaimer: Undertale belongs to Toby Fox and I have very limited understanding of the other AU's in the Undertale fandom.
Waking up as Fresh's host? by AbyssSh3ena
AbyssSh3ena
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"I am a radical host and the one who is taking care a parasite"
Killed it! {Reincarnated as A Killer Varient} by coolkidindahood
coolkidindahood
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⪼Beaten up and betrayed, {Name} dies an unfair death because of their best friend. Having their life and their brothers whisked away in a flash. ≫They find that they inhabit a certain skeletons body, trying to live happily before having their murderer breathe down their neck each second. ≫Its up to {Name} to figure out whether they want to join the good side, or the bad one. {"𝙸 𝚑𝚘𝚙𝚎 𝚢𝚘𝚞 𝚋𝚞𝚛𝚗 𝚒𝚗 𝚑𝚎𝚕𝚕 𝚢𝚘𝚞 𝚍𝚎𝚖𝚘𝚗 𝚌𝚑𝚒𝚕𝚍."} ⧼Reincarnated as Killer sans variant Story!⧽ ⚠︎Warning.1 ! This story contains no ships⚠︎ ✐Simple terms; ✂ Flirts are contained, but will not have any feelings attached to it. ✂Blushing is NOT in a romantic way in any way ✂Physical affection is all platonic. ⚠︎Warning.2 ! This Story contains spelling mistakes, and poor grammar. English is not my native language.⚠︎ {COVER MADE BY ME!!!} __________________________ Ranks; ➫ 19/05/2024 - #1 in; Multiverse. ➫ 15/06/2024 - #1 in; Chara. ➫ 23/12/2024 - #1 in; Badsanses. ➫ 08/01/2025 - #1 in; Undertale. ➫ 24/01/2025 - #1 in; SansAu. __________________________ Started; 03/04/24 Ended; ????
A Dream Within A Nightmare. by RealitytheAuthor
RealitytheAuthor
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|| Reader reborn as Dream! Sans || You couldn't remember much except your name and what happened to you. Ah, right. You died, and now being reincarnated to one of the skeletons that guards the Tree of Feelings. Wait- Isn't this Dreamtale?? And now you're Dream himself?? Don't forget that somehow the literal King of Negativity, your 'brother', Nightmare seemed a little obsessed with you. Oh shi- Congrats! You have become a parental figure and the therapist with a bunch of psychopaths along with some depressed ones! And now they are too clingy for your liking. Almost all of them are overprotective skeletons- Now half of the Multiverse simps for you, while they try to have your attention towards them. Which your 'brother' (aka Nightmare) would confront them, each. and. every. time. Well they always say, you reap what you sow. What is going on with your life. . .? || [A short, crack(?) fanfiction series by Reality.exe] || Ranking : #2 ausans out of 478 stories (August 4, 2024) #2 undertale out of 62.4K stories (November 27, 2024)