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Half-Tale: The Fallen by HolmesJaw
Fandoms: Undertale (Video Game), Half-Life (Video Games)
05 Jul 2025
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Adrian Shephard, an HECU Corporal shipped off to Black Mesa for 'cleanup duty', somehow manages to escape the hellish facility against all odds and, after being 'detained' by the ever-so elusive G-Man, is assigned a mission... to the UNDERGROUND! Accompanied by Chara Dreemurr, the first fallen human turned apparition, they venture through for one, very specific goal... but is that all there is to it?
In... time, all will be revealed.
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Frisk enters the True Lab, and well… they certainly don’t like what they find.
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Chara died, and wake up again as a ghost, the first thing they see is a monster trying to kill a human kid, so they make the most reasonable assumption they can think of: The human did something so evil even nice monsters want to kill them. (they're wrong) They will do something about it even if they can't interact with the world, other than talking to the human, they just need a good enough plan... they just have to be creative!
Frisk just fell in a hole and now there are people trying to kill them and also they're haunted... which sounds worse than it is, because they are haunted by this... small kid, who probably can just talk to them and nothing else, the one problem is that they keep telling them to go fight someone for some reason, and they are being very annoying about it...
...Anyway basically Chara is a small gremlin child that gives Frisk headache occasionally... sometimes... usually... they'll be freinds eventually. (didn't take that long, honestly)
(This used to be a one shot, you can read the first chapter that way if you want to, the story kind of change... a... more than a bit, so I changed the summary, the old one for the Oneshot is in the first Chapter Note below here)
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You have been dating Sans for nearly two years. But after the annual family trip to Mt. Ebott, that might be over. Sans has been avoiding you for nearly a month and you don't know how to get the abnormally busy skeleton to let you explain what happened. And why you had to break the only promise he'd ever asked you to make.
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After freeing the monsters from the Underground and ensuring their rights and safety, Frisk now has one last person to save.
The spirit that has been with them since their fall.
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The way of a Glutton is a non-canon Reader insert story that takes place in the story of Red Mass, a self AU of Undertale.
You are getting a new job in the City of Paradise, the City of which Sans (Dee) and Frisk built.
Although you want to work in the city laboratory and also fulfill your dream of studying magic, you also get to know more monsters that you have ever seen in your life. And maybe your dorky skeleton boss asks you out on a date?
This story will contain lots of drama, blood and tears.
So be excited for it!
Series
- Part 1 of The Way of a Glutton
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After doing everything the right way in the first timeline, Frisk was compelled to do the genocide route for what they felt were "good" reasons. In doing so, they have broken utterly and become something new. Something absolutely devoted to Sans, and not remotely sane. Now they are striving to fix everything and find their path forward. What the hell is Sans supposed to do now?
(This is not an erotica story - it's a drama / sort-of-romance that eventually gets really spicy)
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Reader is a lawyer who was looking for a cheap room for rent. After Papyrus left to study abroad for culinary arts, Sans was down to let her stay in his brother’s room for a fair price. They both have a great roommate relationship; they don’t know each other that well yet, but Sans makes her laugh.
One day, she walks inside the apartment, wondering if she was seeing double or if there were two identical skeletons in the middle of the living room.
Yeah, a second roommate was never mentioned on the lease.Series
- Part 1 of Three idiots
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came out from nowhere, left my whole heart renewed by wisteriabeantrees
Fandoms: Deltarune (Video Game), Undertale (Video Game)
01 Jul 2025
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Kris and Frisk meet on accident on a rainy night. They talk about the SOULS. Kris, somehow, gains a lot of insight from this conversation with a strange and overly energetic child.
it's 4 AM right now and i started writing this thirty minutes ago (because i've been rotating these two in my head and making them crash into each other for two weeks now)
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If I've Fallen From Hell, Then This Must Be Heaven by decafblackberrymora
Fandoms: Undertale (Video Game)
29 Jun 2025
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A certain green-yellow striped sweater donning individual has fallen into the UNDERGROUND. They are accompanied on their journey by a petulant voice in their head (no they are not going insane).
[Undertale, except Chara and Frisk have swapped places.] -
Post vengeance route Clover refuses Frisk the access to Ebott by Kittany_the_Fox
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
29 Jun 2025
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Just an interaction I thought would be interesting !
After killing Asgore and freeing the 5 human souls, Clover came back to their old town. They grew up, and today, guard the entrance to mount Ebott to avoid anyone falling in.
But then Frisk happens
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Will now continue this ! I'll do two separate fics following two routes it can take :]
Series
- Part 1 of UTY : Unfinished Business AU
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A kid falls underground and they are DETERMINED to do the fastest pacifist speedrun ever, this of course becomes a problem for the narrator
- Language:
- English
- Words:
- 3,619
- Chapters:
- 1/?
- Kudos:
- 5
- Hits:
- 57
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When Jane Ainsley finds herself trapped with monsters Underground, it's hard not to fall into old habits. The kindnesses of monster-kind make it easy to become complacent, when she had spent so long avoiding companionship. However, the ever-present pull of the Void keeps her moving forward, towards someone only she can SAVE. In helping Dr. W.D. Gaster find themselves once again, can Jane form her own sense of identity?
An isekai-adjacent story starting Underground and featuring an anomaly that is not our narrator.
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"i already "befriended" your mom last night" by PheebsIgLol
Fandoms: Undertale (Video Game), Deltarune (Video Game)
26 Jun 2025
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Sans realizes that maybe even the past actions he made in the world of Deltarune has consequences.
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FRISK GETS THE FLU SND NOW EVERYONE IS WORRIED
(LET ME KNOW UR THOUGHTS AND IF I SHOULD CONTINUE TO UPDATE THIS)
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By Choice {A Chara x Reader Undertale Fanfic} by imtooshortforyou
Fandoms: Undertale (Video Game)
25 Jun 2025
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Y/N was never the type to be around people. She didn't have many friends besides her sister, but she didn't mind. It wasn't until Frisk and the Dreemurr family came along and became the family she had once lost.
Through Frisk, Y/N is able to realize the power of their determination. One night, as Y/N is hanging out with Frisk and Asriel, the topic of Asriel's dead sibling, Chara, comes up.
For some reason, the conversation led Y/N to want to explore the underground, for maybe there's a lonely ghost wandering around all alone with nobody to talk to.
Reader, Frisk, and Chara use She/They pronouns
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Seven is the Number of Perfection by DodrioTheThird
Fandoms: Undertale (Video Game), Deltarune (Video Game)
24 Jun 2025
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A REWRITE OF "Six is the Number of Sin"
A single golden ray shone on the drooped figure of a single yellow flower. Six petals, six represents imperfection, six is the number of weaknesses and sins. Though there's 7 sins, one could say the last of them was Flowey himself. The number seven meant perfection, he was only one petal away from "perfection". One soul away that time.
Frisk visits Flowey in the underground and takes him to the surface much to Flowey's dismay. So much has changed on the surface, monsters have slowly been reintegrated into society. Adjusting would be difficult for Flowey, to say the least. Not like he has a choice. Yet Frisk and Toriel refuse to let him wilt.
Series
- Part 2 of Cornflower - Undertale AU
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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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Can You Even Call This An AU Explanation, I Didn't Receive A Mint On My Pillow Or Anything by FizziPawpFanfics
Fandoms: Undertale (Video Game), Deltarune (Video Game)
19 Jun 2025
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Basically a chapter-by-chapter explanation of each of my Undertale AUs as they're made.
List:
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- Fallentale
- Undergrowth
- FlowerFell Rewritten
- UnderTheories
- Switched Fates
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Twisted Karma by IFBench
Fandoms: Undertale (Video Game), 逆転裁判 | Gyakuten Saiban | Ace Attorney
16 Jun 2025
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It had been two weeks since the legal world had been turned upside-down from a certain attorney's disbarment.
Franziska von Karma has had enough of it all, and takes a vacation from her job to investigate a mystery of disappearing children.
Legends say that those who climb Mount Ebott never return.
But a von Karma is perfect. A von Karma won't be bested by a simple mountain.
Right?
(In which Franziska von Karma falls into the Underground.)