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I am a Player, and there are worlds to explore! by TrueGuardian32
Fandoms: Undertale (Video Game)
28 Feb 2026
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Undertale Player ends up exploring through Undertale AU's
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You, a human, find yourself in the familiar horror of the Void, after your SOUL is yet again rejected from an AU- seemingly never able to find its place in the multiverse. Yikes. Maybe a certain group of skeletons will take interest in your situation..? Loosely based on the song Ghosting by Mother Mother. (This story is written in 3rd person, so no mentions of y/n or the reader. The human is literally just referred to as 'human.') WIP fic! I pretty much update daily :)
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After the umteenth genocide route, Chara is left alone with their thoughts for perhaps...too long.
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Where All Beautiful Days Begin / Blue Archive X Undertale Fanfic by ark1ved
Fandoms: Blue Archive (Video Game), Undertale (Video Game)
24 Feb 2026
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Also on Wattpad!
Hundreds upon hundreds of genocide in the underground have passed, yet not a single soul could remember them. It was a cycle of awakening, dying, forgetting and repeat.
And the culprit was none other than that child, at least on the surface.
Occasionally, there would be a few differences between each reset. Once, two other judges were transported into the skeleton's world to fight the kid. Another, Sans went on a murderous rampage of his own to get stronger and defeat the kid. None worked out in their favour, however; the kid's determination always brought them back to life after death. It would always end in a reset of both the world and their memories.
However, this time, it was different.
Sans didn't wake up in his bed. Instead, he found himself awakening in what seemed like an endless canvas of sand.
Not only that, but it seemed all his memories from past timelines have returned to him.
*just what is going on right now...
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Upon hitting rock bottom, upwards is the only direction that remains.
Partner, I find myself unsatisfied by this ending. With the ultimate conclusion of my own ideals having proven undesirable, my only remaining option is to try something new.
Though you have ceded the right to interfere, I will keep you apprised of my progress.
Series
- Part 42 of Sol's Undertale Fics
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After the defeat of the first fallen human and the deletion of their file, Clover and Martlet welcome Callum and Rose into the world as their journey through parenthood begins. Follow Clover and Martlet as they guide the Ketsukane Twins through life and grow their skills as new parents
Sequel to "Unbreakable Bond"
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- Part 3 of The Human and the Bird
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In which “THE PLAYER” stops plaguing the Underground, leaving Chara, Frisk and Sans to pick up the pieces.
Time, space, and magic spells.
The age of the Seven Sages comes to an end.
(A DUSTTALE-BASED AU.)
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Flowey will talk to the one behind all of the RESETs: The Player, begging them not to do the very thing he once did—toy with the world.
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- Part 5 of Firmament Files
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Something wrong with my (friend's) copy of Undertale. by defaultuser123 (The_Universal_Maker)
Fandoms: Undertale (Video Game), Deltarune (Video Game)
19 Feb 2026
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"my friend recently got a laptop from a local CEX, on it Undertale came pre-installed in a partition.
They did some checks and can confirm it is a legitimate copy that has a data.win file originating from the same date as the game folder's creation, so it can't be a modded copy.
They have requested I create an account of their experience on their behalf."* (or every undertale copy is personalised)
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His Deltarune: The Preparation Phase by MeriDess
Fandoms: Deltarune (Video Game), Undertale (Video Game)
16 Feb 2026
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Part 1 of Gaster planning out Deltarune
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- Part 1 of His Deltarune
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"Sans isn't stupid, he was a scientist once after all. He knows- he's always known he can't win against this creature, this God. If he kills them then they go back, and they go back, and they go back. And they kill him. For good. But when he closes his eyes, he sees his brother."
»--•--«
Or, Sans becomes a magical girl by stealing this kids soul <3
- Language:
- English
- Words:
- 1,903
- Chapters:
- 1/1
- Kudos:
- 3
- Hits:
- 51
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to kill a time traveler by RubisCO_101
Fandoms: Undertale (Video Game), Deltarune (Video Game)
06 Feb 2026
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Yes, this is heavily based on the "How Do You KILL A Time Traveler" video by Sock Muppet. Enjoy!
“How do you defeat an enemy who has seen every possible outcome, every branching timeline of your existence?
How can you stop the Anomaly?These are the problems Sans first faces when he arrives in the world of Undertale.
After narrowly escaping the Roaring in Hometown, Sans and his brother, Papyrus, find themselves stranded in a strange world with even stranger physics.
With the imminent threat of an ‘angel’—a term Sans is unfortunately all too familiar with—coming to the Underground to ‘free’ monsters from the world, he makes a promise and a plan to save the Underground from this brutal fate… finding out a bit too much about the time anomaly that pervades the world’s clockwork in the process. To defeat it, Sans only ever gets one shot.
With the Perseverance of Alphys(Ok, I know it's justice, but bear with me here), the Kindness of Undyne, and the Integrity of his brother, they begin preparing for an enemy that already knows the ending.”
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A response from the 3 Sentence Ficathon on Dreamwidth.
1) In which Flowey realizes he has vastly underestimated the evil he's been playing with. 2) The game is over and Asriel's feeling (mostly) fine. 3) Chara sees Frisk's struggles and comes to a decision. 4) In which Chara turns out to be an utter troll. 5) In another world, something is always different. 6) The curtains close on Fell!Mettaton. 7) Fell!Flowey is a lazy weed. 8) Papyrus is forgetting something. 9) Chara decides this time they will be the one leaving first. 10. Sans is being dramatic (set in Making a Kinder World verse). 11. Sans wonders what the point is in this. 12. Grillby is waiting for Gaster. 13. Echo Flowers are creepy!cool. 14. Asriel will not escape the romance route. 15. Frisk takes a depression nap. 16. Alphys fails upward while Mettaton helps.
Series
- Part 2 of 3 Sentence Ficathon
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I just wanted to write my own spin on the Dusttale story while being as true to the source material as possible
I love Dust so much!
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A controller's dismissal by Sirsonan
Fandoms: Undertale Yellow (Master Sword Video Game)
25 Jan 2026
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Flowey wasn't going to RESET Clover this time. Even he has his limits before his patience runs thin. Although time RESETs anyways. Flowey figures out who used HIS powers and scares them into leaving. This run faces the consequences of that action.
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𝙼𝚢 𝙷𝚘𝚙𝚎𝚕𝚎𝚜𝚜 𝙷𝚎𝚛𝚘 𝙻𝚒𝚏𝚎 - (𝙊𝘾 𝙓 𝘾𝙧𝙤𝙨𝙨𝙤𝙫𝙚𝙧) by TheWorstLeviathan
Fandoms: Undertale (Video Game), Naruto (Anime & Manga), ジョジョの奇妙な冒険 | JoJo no Kimyou na Bouken | JoJo's Bizarre Adventure, One Piece (Anime & Manga), Bleach (Anime & Manga), Fate/stay night & Related Fandoms, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Re:ゼロから始める異世界生活 | Re:Zero Starting Life in Another World (Anime), Invincible (Image Comics), Marvel, Chainsaw Man (Manga), 呪術廻戦 | Jujutsu Kaisen (Anime & Manga), Devil May Cry (Gameverse)
24 Jan 2026
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This is one of my old OCs, now that I finally have a account on here, I'm gonna write his story.
𝕎𝔸ℝℕ𝕀ℕ𝔾!: This has VERY explicit and terrible content, hence my name "𝕋𝕙𝕖 𝕎𝕠𝕣𝕤𝕥", expect everything stated in the warnings. This story will include but not be limited to, Underage involvementment (Sex, dirty talk, drinking), Religion referencing (inaccurate, some bashing), disgusting/offensive jokes, and much much more. You have been warned, so read if you want, but don't judge, you came here on your own.Series
- Part 3 of 𝘼𝙗𝙨𝙤𝙡𝙪𝙩𝙚𝙫𝙚𝙧𝙨𝙚 (𝙇𝙚𝙫𝙞𝙖𝙩𝙝𝙖𝙣'𝙨 𝙉𝙚𝙭𝙪𝙨)
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Shadows Cut From the Soul by CodePlanTB
Fandoms: Undertale (Video Game), Deltarune (Video Game)
15 Jan 2026
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A few days after the end of the pacifist route, Frisk finds a disturbing entity in Waterfall. They bring their friends to investigate, but they find another world cloaked in darkness. They must try to find the true nature of this entity while working to save the world from eternal dark.
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Guess it's Kaliko's time of the month!
Headcanon from: Velvette/Ghostie (VA of Child 2)
FIC FROM 2025- Language:
- English
- Words:
- 399
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 7
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Oh How I Miss You by DameCorbeau
Fandoms: Deltarune (Video Game), Undertale (Video Game)
09 Jan 2026
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This is a Deltarune FanFic, it will be in the eyes of the Soul / Player (you) and kris. you will be refered using They/Them along with Kris, it will follow the normal route but later once finished i will make a snowgrave section, this story will have some shipping but as a multishipper myself it will have most likely poly. but currently im a Suelle, Kerdly shipper. but also a soulcage shipper (vessel x kris) so there is that, i do plan to have the vessel in the story but they will be there own person. and the player, (you) are more like a parent to the vessel. and are seprate from the vessel. please have fun with this as i will refrence Undertale as i will say in this Undertale and Deltarune are connected through you.
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When Kris encounters their mother and the guy from the convenience store, something different than usual happens...
The player decides to fight Sans Undertale after they see what happened in Kris's living room.