1 - 20 of 52 Works in Amalgamation (Undertale)
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“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 it sounded so far away that 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.
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Desert Sanctuary Guidebook by KarmaSpidr
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
21 Jun 2025
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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
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Distant Souls by Kaboom91
Fandoms: Undertale Yellow, Undertale (Video Game), Deltarune (Video Game), OneShot (Video Game), Heartbound (Video Game), Ib (Video Game)
20 Jun 2025
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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.
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It's all gone. The lab was destroyed. He could smell the blood of the few humans who had worked there
and it smelled delicious
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This universe is right in the middle of an amalgam breakout. Follow several characters as they each find they're own ways through the desecrated universe. -
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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
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Conjoined by Simmeons
Fandoms: Star Trek: The Original Series, Mystery Flesh Pit National Park - Trevor Roberts
20 Mar 2025
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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
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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.
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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. -
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"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
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but you're a monster (and i'm your only friend) by theriveroflight for PatriotsPeak
Fandoms: Undertale (Video Game)
29 Jan 2025
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You wake up. We're not alone.
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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:
- 51
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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.info/works/60534595/chapters/154543903
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A Canon Divergent of Sixbones where Sans melts but doesn't melt into his brother.
After hundreds of resets both of Pacifist and Genocide, Sans breaks down and ends up falling down. Not wanting to lose his brother, Papyrus brings Sans to the lab and finds the True Lab. Injecting determination into Sans.Papyrus due to extreme stress has the ability to glance into other timelines activate while trying to care for his now blind partially melted brother. Now they face the fact that they will have to leave their old lives behind.
Series
- Part 1 of Undertale Multiverse } Famine and Strife
- Language:
- English
- Words:
- 1,392
- Chapters:
- 1/?
- Kudos:
- 13
- Hits:
- 169
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Amalgamates Tale(Undertale AU) by HeartDragonSlayer (Hydrakn1ght)
Fandoms: Undertale (Video Game)
12 Jul 2024
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Original Summary: Frisk has reset many times already. Yet, they still keep doing it. Too many resets can cause dangerous consequences. (This is an AU that I thought of. What if Alphys had injected determination in all sick monsters as a "cure"? Of course, everything will be turned into these sad little guys. Most characters are Amalgamates of two or more monsters. Warning: Some parts will be very sad because these are Amalgamates we're talking about.)
First Published: March 7, 2016
Final Update: March 8, 2016 -
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"Humans are dangerous! They cannot be trusted and certainly not 'escorted'."
The words of Martlet's mentor weigh heavily on her in the days that follow. What is she to make of his declaration when she doesn't know what it means to trust or be trusted? Unbeknownst to her, chance encounters with his daughter could give her an idea.
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There have been a lot of rumors floating around recently. The barrier shattered, "fallen down" family members returning, true hope for the future of monsterkind... things like that. Things much too good to be true.
Everyone around Ceroba believes it all without question, and eventually she's pushed to investigate. But maybe those rumors aren't as false as she initially believed. Maybe she was a bit too quick to judge.
And maybe she can see the Surface. Maybe she can see her little girl again.
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Ceroba gets drunk and steals Mario's kart by ARl_3X
Fandoms: Undertale (Video Game), Super Mario Bros. (Video Games), Grand Theft Auto: San Andreas
15 May 2024
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Just what it says in the title
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Kanako comes home.
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The power goes out in the lab, and the amalgamates do... amalgamate things
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just a short oneshot -
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WiseTale is one of the many prequels to Undertale, it is branched to the main timeline however whether it's the original history of Undertale is still unknown to this day. The AU revolves around the 7th forgotten human that fell after Chara, he is looking for his siblings as they fell down to the Underground. The seventh human is faced with a challenging path will he get to the barrier or will he fall just like...
Series
- Part 1 of Giroverse: The WiseTale Series