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Sick To Death (Of Me Chasing You) by CrossoverAU
Fandoms: Undertale (Video Game), Alice by Heart - Sheik/Sater/Sater & Nelson
22 Jun 2025
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Raine was sick. Really sick.
The kind of sick where, despite not knowing what she had, she knew she didn't have long left.
Her best friend Sans knew that too.
Not wanting her to live her last moments trapped in her house, Sans read her one of her favorite stories, Alice in Wonderland.
While chasing her through the pages, Sans learns that he loves her too much to let her die.
Will he be able to let her go or will he try to selfishly stop the clock?
Aka an Undertale/Alice By Heart crossover fic because I couldn't find one
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In an attempt to try finding and saving the five fallen children that came before him, Clover makes his way into the Underground beneath Mt. Ebott. He needs to find a way to get to them, and deliver justice on their behalf... if he could muster the courage to do so. At the very least, he wouldn't be alone... no matter how badly he, or his newfound company, may have wanted it. Thanks to mysterious circumstances, when Clover finds himself having fallen into Mosterkind's territory, a certain spirit is inexplicably tethered to them... they go by Kanako.
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A Third Chance by NullVol
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
22 Jun 2025
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Very few people get a second chance at life, but what if someone had the chance at a third?
Tags are subject to change.
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Frisk sits down next to Asriel and pushes the pot off to the side a little. His gaze has begun to trail down to the patch planted above your bones. You would give anything right now to know what he’s thinking, and if there’s a part of him somewhere that still sees you. Not the shadow inside Frisk he mistook for you. The little dark streak that followed in your footsteps.
“Penny for your thoughts?” Frisk asks for you, pulling a nickel from their pocket.
The flower glares. “Are you stupid?”
chara and frisk visit an old friend.
Series
- Part 4 of still just you, frisk
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It has been 1 year since Clover's sacrifice for Monsterkind, and all of their friends still have not fully come to terms with it, but among all of them, Martlet has taken it by far the worst. Only too late did she realize just how much the human truly meant to her. Love and grief can make you do many things you might regret, something Martlet repeatedly learns the hard way, but after the barrier is broken, a miracle of HOPES and DREAMS comes to pass that means perhaps she can find a second chance to rectify her greatest mistake and build a happy life despite what certain figures in the shadows may be plotting
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A seventh human falls into the Underground, but it isn't Frisk...
Erika finds herself in the world of the Underground, where she meets the spirit of Chara, which she shares a surprising amount in common with despite the strange circumstances. Erika then begins her long journey to return home, though she begins to wonder if she even wants to return home.
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200 years ago, a dark force killed the two princes of the Underground. In the present day, Frisk falls into an underground where only Home is left still standing. Can she help bring hope to a nearly hopeless underground?
Or is it already too late?
Updates every 12 days!
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OMORITALE: Fallen Common Sense by Sajsd2000
Fandoms: OMORI (Video Game), Undertale (Video Game)
21 Jun 2025
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Not Canon to the main story: OMORITALE: FALLEN DOWN
Just funny incorrect quotes, short stories, and occasional shipping moments
What should you know before reading this? simple
This was written as mere entertainment and that Sunny and Aubrey replace Frisk in their Undertale journey and that Undertale Yellow is also canon. That's it.Series
- Part 3 of OMORITALE: Fallen Down (Fan-Series)
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To Mend A Shattered SOUL (previously Shattered SOULs) by Thunder_child
Fandoms: Undertale (Video Game)
21 Jun 2025
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How many times will my body be burned? How many times will my bones be broken? How many times will my blood be spilt? How many times will you shatter my soul?
Frisk has been through the Underground countless times, pacifist run after pacifist run, yet she cannot escape. Every run, she confronts the monsters, offers mercy, dodges, tries not to die, and inevitably is killed by people she has called “friend”. How many times will her soul shatter before she decides enough is enough?
Sans has watched Frisk’s journey through the Underground countless times. Each time, she chooses mercy. He’s proud of her. It’s a little boring watching an immortal run around trying to do the impossible, but hey, not like anything bad will happen.
(Yeah, you thought this work was finished! Ha, joke’s on you! Or me, I guess. I also thought it was finished. Well, it dug its claws into me and won’t let go. Blame Toby Fox.)
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Monsterkind's Hero is a Title Soaked in Blood by gasbag64
Fandoms: Undertale, Undertale Yellow
21 Jun 2025
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After unintentionally leading Clover to their death and being given a title they despise for it, Martlet, Ceroba and Starlo vow to never let another human face Asgore unless their life is spared and to prevent a second human-monster war from breaking out. However, this is no easy task. They have to keep their plan secret from the Royal Guard and confront their guilt, weaknesses, and self-doubt. Despite everything... can they truly be heroes?
Meanwhile, a flower, opposed to both the Guard and Clover's friends, secretly tries to do his best to make sure the next human faces Asgore with as few hitches as possible in case he can't absorb their SOUL first. He doesn't feel the need to try too much. After all, if his plans fail, he can always reset... right?Series
- Part 3 of Clovers and Sevens
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It was supposed to be a normal hike for Celeste. The birds were singing, the flowers were blooming. On days like this, she loved to go outside.
Except things quickly turn upside down.I feel like I've seen this concept before with Underfell but can't remember which fic. If I find it I will put this as being inspired by it.)
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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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"I think if you're around... Just living in the surface world doesn't seem so bad."
This is not what he had in mind, is it? That doesn't matter, however - it seems Asriel got more than he bargained for.
- Language:
- English
- Words:
- 1,895
- Chapters:
- 1/?
- Kudos:
- 6
- Hits:
- 25
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Imagine if the person who fell to the UNDERGROUND wasn't Frisk? What if it were someone completely different, someone in control of not only their choices, but their powers as well? Meet Grace, a young adult who just happened to be walking through the woods the same day Frisk decided to fall. Grace managed to SAVE Frisk from their usual fate, but only in exchange for hers; Grace falls down into the UNDERGROUND. As she makes friends and walks through the UNDERGROUND, read to see how a different character might have made her decisions on the same path an innocent child took - and how she might ruin it.
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Nightmare had been so kind.
He'd said all the right things and done everything perfectly to gain Dream's trust.
When had the proposition turned from the possibility of trust to the promise of power?
Or: Dream gets an invitation to stay at Nightmare's castle...forever!
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An action-based fantasy fan novel about the popular game Undertale. Taking place within a vastly different alternate universe from the main one, 25 years after the freeing of monsters, watch as a young child named "Javelin" learns to grow through his own naivety while keeping the people around him and the world itself safe from a dangerous new threat.
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Unexpected Hero by LemonCake64
Fandoms: Undertale (Video Game), The Legend of Zelda & Related Fandoms, The Legend of Zelda: Twilight Princess
20 Jun 2025
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“Not so fun being stuck in some loop right? Trying to fight to protect what ya got, not getting a choice in it. If I had the choice I wouldn't remember either.” The words oddly felt comforting. Link let out a slow breath, closing his eyes for a brief moment.
He didn't feel alone for the first time in a long time.
And that?
That was terrifying.
“To be honest, I kinda gave up a while ago. Just sat back and let the chaos go on, felt like nothing I did mattered anymore. Everything would just be reset anyways. Stopped caring what happened, that was until you showed up.” The skeleton’s eyes bore back into the Hylian.
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The human was not gonna back down nor fight, and Sans, if possible, wanted to avoid a violent escalation of the situation as well. Because, despite the souls’ best efforts, his body had not yet recovered from his escape. Every single one of his bones ached, and he was almost certain that the cracks that already covered a majority of his skull had expanded.
However, the stalemate didn’t last long because, as it seemed, the human had an ace up their sleeve. The outline of a black soul manifested on their chest and, soon after, a bright red button with ‘RESET’ written on it appeared in front of them. Sans barely had the time to notice Killer’s eyes go wide and wonder why that was before the human pressed it.
Sans stumbled onto a snowy path with no grace, alone and lost in an unfamiliar frosted forest. Snowflakes slammed harshly against his bones. They looked so delicate and yet he could swear they left a thousand tiny cuts on him. It was torturous… and yet familiar.
That was the power of a human. No. That was the power of an anomaly.
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or, Fresh out of the Void Color stumbles upon Something New. And, in his attempt to help, he perhaps bites off a bit more than he can chew
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The Doctor's Descent by Feanyx1
Fandoms: Undertale (Video Game), Doctor Who (2005), Doctor Who
20 Jun 2025
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He thought that the radiation would kill him. He thought that his time as the Doctor would come to sad and brutal end. He was wrong. And that was so much worse.
In his efforts to find himself, and without his companions, he accidentally stumbles onto a monstrous civilization miles below the Earth. With his newfound DETERMINATION and some new allies, he'll come to realize what it truly means to be a friend, and learn how to live his last lives with his head held high.
And make sure that, just this once, everybody lives.
OR
Undertale but the Tenth Doctor replaces Frisk. Fluff, angst, and time shenanigans ensue.
*No knowledge of Undertale or Doctor Who is required, though it is helpful if you've experienced at least one of them.
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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.