1 - 20 of 59 Works in Amalgamation (Undertale)
Navigation
Listing Works
-
And We Give It All We Got by FortifiedCastle
Fandoms: The Amazing Digital Circus (Web Series)
07 Sep 2025
Tags
Summary
Is it wrong to want things to be better and actively advocate for it? Is it wrong to want things to change? In a world of complacency that is very much content living behind the cities' walls and away from what they call the Amalgamation, Joy Wielders (users that harness a power called Joy) are few in numbers and can only do so much. A young Joy Wielder who has trouble harnessing and controlling her power wishes for things to be different in her little world when disaster sends her spiraling towards a dangerous journey. Spurred on by the voice in her head, she needs to find a way to beat back the Amalgamation and help out a missing troupe lost to time.
-
A Former Royal Scientist’s Research of the Space Time Continuum by stitchthelilo
Fandoms: Undertale (Video Game)
03 Sep 2025
Tags
Summary
A little bit of rest during her research could definitely hurt, yet her eyes began to shut anyway. The consequences to this were much more dire than Queen Alphys could’ve ever expected, and after an abnormal earthquake she finds herself stuck within the endless Multiverse.
And for some reason Sans is.. everywhere??
OR
Takes place right after the Alphys Neutral Ending, and a freak accident sends Queen Alphys out on a travel through the Multiverse.
Series
- Part 2 of longfics
-
Desert Sanctuary Guidebook by KarmaSpidr
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
31 Aug 2025
Tags
Summary
Clover doesn't give up his soul because justice still needs to be delivered.
The Wild East, and later practically the entire Dunes, declares independence. They declare that any human within their borders is under their protection.
Civil War looms over the Underground.
Would you like to see what happens?
Note: This is NOT a story. This is an archive containing information about my AU, Desert Sanctuary. I might write a proper story in the future, but for now, this is where you can read about the narrative, the characters and how this massive change affects Frisk's journey.
Fanart and other fan works based on Desert Sanctuary are welcome and encouraged
-
Tags
Summary
"Despite having been the royal scientist for quite some time, Alphys never really felt like the title held any weight. Sure, the king came to the lab from time to time, forcing her to frantically clean up the cups of noodle and boxes of anime she found in the dump when she heard news of his arrival. Sure he gave her tasks from time to time, but they were meaningless. Checks on the Core—it wasn’t like she was the one doing physical maintenance, just checks and programming for self-repairing functions to work. She never even went inside the Core. Not after what happened to…well, never mind."
An Undertale prequel that looks in-depth into the events of the True Lab
-
Tags
Summary
“There used to be two boys I hung out with,” Nagito tells her. “They were twins. Hajime and Izuru. I didn’t know their circumstances, but we knew each other.”
The snow is cold, in snowdin. Chiaki shivers into her kitten hoodie, watching Nagito as he watches the distance. “I think you would have liked them.”
“What happened to them?” Chiaki asks him.
He turns to her, smiling, “They fell down. It’s— a natural illness of monsters, sometimes. A state close to death, what you humans call a ‘coma’. They were taken by the royal scientist and her assistant. They were as good as dead anyway, so it didn’t seem like a problem that they would be used in research to break the barrier.”
Chiaki shudders, “So they… They’re dead?”
“See, that’s the thing,” Nagito says. “We never got their dust back.”
[KomaHinaNami Week 2025 Day Six: Fantasy AU/Other AU.]
Series
- Part 3 of forwards, beckon, rebound (Undertale/Multifandom Crossover)
- Part 6 of KomaHinaNami Week 2025
-
Distant Souls by Kaboom91
Fandoms: Undertale Yellow, Undertale (Video Game), Deltarune (Video Game), OneShot (Video Game), Heartbound (Video Game), Ib (Video Game)
19 Aug 2025
Tags
Summary
The soul is an important part of a persons identity, the accumulation of a person's being. But different worlds play by different rules, so when a force trapped between worlds starts tampering with those worlds, things start to come apart. It'll take the help of a Fun Gang, a Savior, a young girl, a boy looking for his dog, a small cowboy seeking justice, and an incredibly determined human to save all their worlds from the ever looming darkness.
-
GOOPY KITTY // AMALGAMATE MAD MEW MEW AU INFO by silverstormsxx
Fandoms: Undertale (Video Game)
18 Aug 2025
Tags
Summary
what it says on the tin.
-
The Last Amalgamate (The Peacock AU edition) by WingsOfShen
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game), Kung Fu Panda (Movies)
28 Jul 2025
Tags
Summary
After millennia, the barrier keeping the monsters Underground has finally broken. The entirety of the Underground does not remember what happened. All that is known is that a living human child was involved.
Before starting a new life on the surface, Frisk joins Alphys in sending the final amalgamate back home to her family, making new friends along the way and giving them their much-needed happy ending.
(Based off "The Last Amalgamate" by VyletBunni and the DeltaTraveler team. Credit goes to them for the animation series.)
Series
- Part 4 of The Peacock AU
-
Transformers: Defenders of Earth by DarthFlores
Fandoms: Transformers - All Media Types, Transformers Animated (2007), Transformers (Bay Movies), Transformers: Prime
27 Jul 2025
Tags
Summary
Ten thousand years after the cybertronian civil war, Optimus leads a band of Autobots throughout the galaxy in search of the lost Cybertronian colonies. But after finding the Allspark, Optimus and his crew battle the Decepticons where they crash land on a planet called earth.
Fifty years later, the Autobots awaken to defend their new home and to protect the Allspark.
-
Tags
Summary
A collection of Five Nights at Freddy's short stories and drabbles created from prompts on Tumblr. There's a little of everything in this body of work.
-
Tags
Summary
“As always, humans first.”
The crowd was silent, clearly unenthusiastic. You tried not to think about your odds — it never did you any good. What was six slips of paper as opposed to hundreds?
With a shaky breath, you quelled the hammering in your chest. It will be okay. You do this every year, right? Every year, you come to the square, watch two members of your community be sentenced to certain death, then go home and silently contemplate the conditions of your world. That’s how it went every year, and you were certain that is how it would go this year.
So when the cold metallic voice announced your name over the loudspeaker, you could feel your heart stop.
Ice shot down your veins and a ringing filled your ear. You thought you could hear your mother scream, but she sounded so far away, you could barely register it. Was it really… it was you?
Another announcement of your name, followed by a sing-song, “come up here, darling!” confirmed yes, you. You were the human tribute of District 12 in the seventy-fourth annual Games.
Series
- Part 1 of the games we play
-
Tags
Summary
You fell chasing your little sister. Now, disguised as a monster, your gambling everything to get Frisk out alive—including trusting a lazy skeleton who sees through her lies. With Asgore’s knights closing in and the king needing one last human soul, survival demands shortcuts through glowing caves and MTT Resort glitter. But Sans’s bone-dry wit and hidden power blur the line between using him… and losing your heart underground.
Neutral Route | Slowburn Sans/Reader | Found Family | Protective Siblings | 2016 Undertale fic vibes
-
Tags
Summary
There's been an epidemic of monsters suddenly falling unconscious, never to wake up. It's been labeled as falling down and the patients the fallen. As the Royal Scientist, Alphys has been put in charge of fixing things. But what is she supposed to do when her girlfriend's mom is among the fallen? Or when she makes things so much worse? How can she face Undyne or tell her what she's done? How will she fix this?
Might be a little out of character because I haven't played true pacifist in a while and I'm at the Sans fight so I don't want to reset to start true pacifist
-
Conjoined by Simmeons
Fandoms: Star Trek: The Original Series, Mystery Flesh Pit National Park - Trevor Roberts
20 Mar 2025
Tags
Summary
Leonard McCoy and Montgomery Scott were both workers at the Mystery Flesh Pit National Park. A few days before July 4th of 2007, Leonard was supposed to visit his family in Georgia with Montgomery. Unfortunately, Montgomery had to work, so Leonard stayed behind with him. So, the medic and trail engineer stayed behind and worked.
They got stuck in the pit, amalgamated together, and now they're struggling to cope with it all.
Series
- Part 6 of Simon's Scones
-
Tags
Summary
What if everything you knew and loved crumbled around you, and all you could do was sit and watch? What would you do if your friends all died, and the most you could do was watch on a big screen?
These memories were no blessing, not at all. Even if she could warn them, she had to die over and over and over and over and-
It just.. wasn’t worth it, it never would be, not to Alphys.
OR
Alphys begins to remember resets, and she wished she didn’t. Oh how she wished she didn’t.
-
Tags
Summary
Frisk wants to bring Flowey to the surface. Flowey won’t come but Asriel would and Flowey knows how he can come back. Will Frisk take the risk and do what they must to bring Asriel back. And if they do, how will the world react to his return.
See how the children of the Dreemurr’s family integrate in the surface world. -
but you're a monster (and i'm your only friend) by theriveroflight for PatriotsPeak
Fandoms: Undertale Yellow (Master Sword Video Game)
29 Jan 2025
Tags
Summary
You wake up. We're not alone.
-
| The "Damoiseau" - Project "Harbringer" I by Yohoho_N_a_bottle
Fandoms: AFK Journey (Video Game)
06 Dec 2024
Tags
Summary
I am the righteous hand of God!
And I am the Devil you forgot. -Hell's coming, Poor man's poison
Series
- Part 12 of "Once upon in a branching timeline"
- Language:
- English
- Words:
- 929
- Chapters:
- 1/1
- Hits:
- 17
-
Tags
Summary
Sparrow Patterson was just your average lumberjack trying to get by. Today, he had a job that he needed to get done. Only this time, he went in a different direction than he normally would not to be stuck in traffic. Only to find himself lost after taking a few wrong turns. If only he listened to the warnings given by his ancestors before him.
- Language:
- English
- Words:
- 4,116
- Chapters:
- 1/1
- Hits:
- 56
-
Tags
Summary
Take on the perspective of eight different heroes in different eras each having a tale of their struggles and upbringings. The heroes in question are Spencer the bard, Eiko the editor, Tilly the social media influencer, Charlie the alcoholic with never ending nightmares, Hana the ultimate detective, Anna the android striving for freedom, Corum the skilled player of "The World", and Serena the kind-hearted healer.
The Poet is based on Final Fantasy, Octopath Traveler, and Undertale
The Connection is based on Calling Wii and Fatal Frame
The Influencer is loosely based on the influencer portion of South Park games
The Uncommitted is based on Catherine
The Trials is based on Danganronpa
The Revolution is based on Detroit Become Human and Nier
The Liminality is based on .hack//
The Demon Queen is based on the Middle Ages Chapter of Live A LiveThe Final Chapter has arrived (be sure to read the entirety of LALANE before jumping in) https://archiveofourown.org/works/60534595/chapters/154543903