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The Shattered Timeline. Book One; Prologue by The_One_Aaron_1
Fandoms: Undertale (Video Game), Glitchtale - Fandom
11 Jan 2026
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Hello.
I am Frisk.
Maybe you’ve read my ‘First Draft’ of this Biography.
I’m sorry to say that… Gosh, looking back, I could have done so much better. But… I spent so long in the Underground that I wanted to just skip ahead to the more ‘New’ stuff. I paraphrased many experiences and ignored many details in favor of getting to the ‘fun’ part.
As of now, the Third Book of ‘A Shattered Timeline’ has been released in full. I’m struggling with the Fourth. Recalling everything that happened is… hard, you know? And scheduling is a pain in the ass, too!
But I’ve got Chara here.
“Sup.”
And Asriel, too.
“Yes.”
I’ll use some kinds of notation to mark the difference between us, for the Deaf viewers. Probably.
If you haven’t read through those other parts… I mean, I’ll try and keep the ‘spoilers’ limited, but for those of you who did read those other parts… The fourth member of the ‘Gang’ isn’t gonna be here. Probably. You never know if they’ll break through the door to say Hi or something.
I think that’s just about everything that needs to be Prefaced.
Chara, take it away.
Series
- Part 1 of The Shattered Timeline. (Updated.)
- Language:
- English
- Words:
- 489
- Chapters:
- 1/1
- Hits:
- 0
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The war against Nightmare has come to an end.
Negativity has receded. The multiverse can breathe again.But some battles do not end when the final blow is struck.
Stripped of the entity that turned him into a symbol of terror, Nightmare awakens in a reality that rejects him, fears him, and watches closely for the slightest mistake. To many, nothing has changed. To others, he is a threat waiting for an excuse.
As the multiverse struggles to reorganize itself, Nightmare is forced to face a role no one wants to name: negativity still exists, and someone must guide it.
Between the council’s reluctance, the quiet support of a few, and the intimate bond that emerges between him, Killer, Dust, and Horror, Nightmare learns that surviving is not the same as being accepted.
This is a story about what comes after the war. About guilt, prejudice, and balance.
And about continuing to exist when the world has already decided who you are supposed to be. -
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Cherophobia: a phobia where a person has an irrational aversion to being happy; a fear of positivity
For hundreds of years, he had been without a match. Alone. Chasing any connection he could find. But finally, just as he was about to give up hope, it happened. He had a Soulmate.
You’d made a terrible mistake. It was hardly the first time in your life to have done so, but eating the soul of a dying god and ending up stranded in another multiverse certainly stole the crown for World’s Biggest Whoopsy Ever. Honestly, at this point, you just wanted to disappear into the shadows and be left alone. A tragedy then, that you seem to be bonded to this multiverse’s deranged, obsessive, and generally unnerving ‘angel’.
Series
- Part 3 of Soulmate Au
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What if Frisk is in the world of HxH!
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A new AU for the Undertale Game centering on Flowey/Asriel Dreemurr and his desire to help Frisk keep their "Happy Ending" from the true pacifist route, following the Glitchtale storyline and the Gaster backstory from Hellsiblings, culminating in a completely new AU.
Series
- Part 1 of Soulless Angel Series
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From Beyond by emmylouispog
Fandoms: Avatar (Cameron Movies), Star Wars - All Media Types, Star Wars: The Clone Wars (2008) - All Media Types, Fran Bow (Video Game), Undertale (Video Game), Hollow Knight (Video Games), Little Nightmares (Video Games), Percy Jackson and the Olympians & Related Fandoms - All Media Types, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Five Nights at Freddy's, Gravity Falls, Cult of the Lamb (Video Game), Arcane: League of Legends (Cartoon 2021), The Last Unicorn (1982), Bendy and the Ink Machine
10 Jan 2026
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MULTI FANDOM CROSSOVER
MORE FANDOMS TO BE ADDED
This will probably hit the tag limit at some point, and will be broken up into multiple to account for this!The goal is for each fandom to interact at at some point, but it starts out very episodic!
Ch 1- Star Wars x Avatar
Ch 2- Fran Bow x Undertale
Ch 3 - Hollow Night x Little Nightmares
Ch 4 - PJO x MHA
Ch. 5 Matpat defeats fnaf
Ch 6. Gravity Falls x Cult of the Lamb
Ch 7. Arcane x The last Unicorn
As the veil thins, and worlds collide, can the universes go back to normal?SCHEDULE (tentative)
Ch8 Arcane x BATIM
CH 9. Arcane x Portal
Ch 10. Marvel x LOTR
CH 11. Kpop Demon Hunters x Hazbin HotelAuthors note: A concept from when I was 12 that I’m revisiting.
Series
- Part 1 of From Beyond
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
10 Jan 2026
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It's been a few years since Monsters returned to the Surface and lots of things have changed... Accompany your favorite characters from Undertale, Undertale Yellow and Deltarune as they try to manage their everyday responsibilities and go through a few wacky adventures while at it in this slice-of-life crossover AU.
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Horror asks Cross to come on a hunt with him, and Cross discovers things about himself.
- Language:
- English
- Words:
- 4,092
- Chapters:
- 1/1
- Hits:
- 3
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Sacrificed Light (A Deltarune Yellow Take) by ElRafauricio
Fandoms: Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
10 Jan 2026
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Summary
When the balance between Light and Dark begins to crumble, an ancient legend resurfaces. One that speaks of heroes, sacrifice, and a light not meant to last.
As Dark Worlds spread and prophecies guide the steps of the brave, a quiet, golden presence walks among them, carrying warmth where shadows reign. Bonds are formed, truths are hidden, and the line between destiny and choice grows dangerously thin.
This is a story about prophecy and what it demands.
About love that should not exist.
And about a light that shines not to win… But to end.In a world that believes it understands its legends, some truths are buried for a reason.
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Deltarune FR: Hammers and Blades by LanceGlover03_Brakamonaga
Fandoms: Undertale (Video Game), Deltarune (Video Game), Dungeons & Dragons (Roleplaying Game)
10 Jan 2026
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With class upcoming and a class meant for soon-to-be royal guards on the line, Dess trains her hardest to land even a single hit on her mom.
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The main cast of Undertale finally made it out of the Underground... But... something seems strange, especially to Frisk. Where is everyone? Where is humanity? How will the monsters be able to live on the surface? What is... going on?
A Vintage Story x Undertale Crossover
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Cenotaph by Teuthsolvent
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
10 Jan 2026
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Only memory remains
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Won't You Cut Down That Apple Tree For Me-? by Vin_cant_sea
Fandoms: Undertale (Video Game), DCU
10 Jan 2026
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DC x MTT
Alt Title: very edgy evil gay poly ends up in edgiest city in all of existence across all of time and space, the fic
The Murder Time Trio accidentally gets teleported into the world of DC, specifically Gotham City. As Gotham is a (very very) emo ahh place, they fit in just fine, though that may be because they are suddenly humans. Oh no, this terrifying trio has been turned into humans-! Teenage humans at that. As they are humans, their magic is out of whack, coming out a bit powerful in the wrong places, and teleportation going a bit wild….wrong. Oops. Did they accidentally become vigilantes-?
Seems like it. Whatever, at least there isn’t a brooding old ahh man who believes he is part of the night—oh wait. Ehh…at least he is leaving them alone.
Oh.
No.
No, he is not.Oh shit…are those adoption papers…-?
Oh, they are really fucked, aren’t they…-?
Series
- Part 1 of MTT X DC
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The Beast You've Made Me by I_want_a_coffee
Fandoms: Deltarune (Video Game), Undertale (Video Game)
10 Jan 2026
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He swallowed hard, trembling but unable to tear his gaze away from the being before him. Fear still rooted him in place, but curiosity—foolish, human curiosity—kept his eyes fixed on the way the moonlight caught the monster’s fur, the faint curl of his antennae, the glint of sharp teeth in the dark.
It should have been pure terror. And yet… it wasn’t.
And that fact almost scared him more than the monster did.
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A Spamtenna Monster/Human Undertale AU inspired by Beauty and the Beast
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Fallen Child, Lost Girl by YetAnotherRandom
Fandoms: Deltarune (Video Game), Undertale (Video Game)
10 Jan 2026
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Summary
Fallen Child and a Lost Girl find each other.
Will that be enough? -
Cocoapowder Fic Ideas I Can't Get To Yet by 3Pleatv
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
10 Jan 2026
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Summary
With the sudden popularity of Early Awakening (which I hugely appreciate, by the by!) I said in the seventh chapter of that fic that I had been debating making a Cocoapowder fanfic for a good bit and decided to settle with fleshing out their dynamic first.
And then the evil thoughts came. "You could write more, you could!!!!! You have the capabilities!"
But y'see, I fear burnout. So, I made a compromise. I'd write snippets of those ideas and leave them here for when I finish with/get distracted from Early Awakening! Short snippets of the ideas I have.
Enjoy!
Chapter One - Superheroes AU
Chapter Two/Seven - Deltarune AU
Chapter Three/Four/Five/Six - DND
Chapter Eight - Spamtenna Cocoapowder AU (yes you read that right)Series
- Part 2 of Cocoapowder
- Part 1 of Undertale DND AU
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After the battle, you look at your hands... why did I became a skeleton? by Quinme
Fandoms: Undertale (Video Game)
10 Jan 2026
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Your dear friend Reishu was in danger, she suddenly got attacked by a mysterious skeleton in a black and white, who carries a big blade on his back. In this fight you truly did your best to protect her, giving it all your efforts.
After a long battle, you lay on the ground, defeated and hurt, the only thing that's is on your mind is the fact that you managed to buy some time for your friend. That you did good.
The unknown skeleton lean closer to you, saying something, but you hear none of that, refusing to listen the words of the enemy. Despite it feeling like the end, you wish to do something before taking your last breath. You haven't used your magic for the past ten years because of how messed up it got after your father passed away, but now you do not care about messing up. With the last effort, you do your best in attempt to take this guy with you. Reaching for your soul, you use a spell to end this, to take rid of this intruder!
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Clovers and Pines by Luxas_Lounge
Fandoms: Deltarune (Video Game), Undertale (Video Game)
10 Jan 2026
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Summary
A high school AU fic where Kris and Frisk try getting their OTPs together :33
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Husk of the Hollow by MagicalWildCard
Fandoms: Deltarune (Video Game), Undertale (Video Game)
10 Jan 2026
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After screwing around a bit with Deltarune in order to make the best mod in all of the fandom, the player Adam went a bit too far and ended up causing Gaster to appear and supernaturally drag the player into the game. Join the Soul as it has ended up becoming its own Darkner through the use of inhabiting an object that was created from the modding that had still existed, and became a part of their world.
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Curiosity is weird. It can either be incredibly useful, or incredibly dangerous. Papyrus knows that all too well.
He knows his brother is smart. He's amazing at quantum physics! He's very good at gathering intel on people. And when Papyrus needs help, he knows he can always count on his brother to give him the best advice.
It's just that... sometimes...
Series
- Part 8 of Skeletwins Side Stories