15 Works in Something New Sans | Killer-centric (Undertale)
Listing Works
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Summary
Killer’s life had one mission; Kill King Nightmare before he can produce an heir. It was all he thought about for thirteen years. Putting up with abuse and torment and brutal train regimens. And now? Now, on the night of the summer festival, he was going to accomplish is mission.
(A high fantasy Sans AU.)
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A Chaotic Piece About Killer Losing His Fucking Mind and Being a Self-Sabotaging Bitch by App1eS0uce
Fandoms: Undertale (Video Game)
23 Sep 2025
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Summary
Trigger/Content Warnings for Overdosing, Hallucinations, Throwing up/Vomiting, Being unsure of one's reality (please let me know if there’s anything else I missed)
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Another Killer.
In his room.
“What the fuck.”
“Hello, Killer.”
Series
- Part 7 of Killer’s Krying Korner
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My hatred grows, my determination intensifies. The dust surrounding me is insignificant compared to my rage toward the human. "I regret nothing," I say before unleashing my fury.
But then, Chara's words haunt me.
"Feeling something new, huh? I want to try again."⚠
- "Semi-Canon"
- This is just a fanfic that will likely end as soon as I run out of ideas. If you don't like what you read, I'm inviting you to leave! Thanks for stopping by! -
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Summary
Killer wants the human on board, and is really excited about it despite the earlier 'introduction'.
The human in question doesn't seem as pleased as Killer does.
Series
- Part 2 of Creature(s) onboard.
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This is my tribute to MTT Week on Tumblr. These are fics focusing on the Murder Time Trio in duos, singles, and of course the trio. I’ll label whose the main characters in the chapter title.
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Cross was beginning to miss when tears would fall from his eye sockets, at least then he knew he could feel. But did any of that really happen or were they just memories he was created with? Everything he remembers had a chance of not being real. An imitation of life, just like him.
OR
Kross enemies to lovers, anyone? 😏🫴🍷
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He thought aliens were fake, just made up lies to scare kids away from asking, because how else would they exist?
Apparently, he was so, so wrong.
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The alien bad sanses and human cross nobody really asked for!
Series
- Part 1 of Creature(s) onboard.
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Summary
Killer never said goodbye.
Never told Color how much he mattered to him.
And after all this time, Killer is finally starting to feel the weight of everything he never said.Series
- Part 1 of May Or May Not Be Canon In My UTMV
- Part 2 of My UTMV One-Shots
- Language:
- English
- Words:
- 1,203
- Chapters:
- 1/1
- Kudos:
- 11
- Hits:
- 76
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I Think you're Holding the Heart of Mine (My Heart Is Yours) by KillersLengthyTDick
Fandoms: Undertale (Video Game)
26 May 2025
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Summary
Nightmare apologises for mistreating Killer, which Killer finds weird.
Series
- Part 1 of drabbles/ficlets
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“Get a load of this monster
He doesn't know how to communicate
His mind is in a different place
Will everybody please give him a little bit of space?”Or
Killer ends up having a full breakdown during a mission. Good thing Cross is there to sort him out.
Series
- Part 4 of BSP poly moments
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“Unfortunately, I know someone who possesses the ability to bend even the most twisted souls into a… proper shape again. Which means I can never rely on you fully, not without bearing the risk of betrayal.”
Killer may have lost his emotions, but not his impeccable perception. This isn’t a worried expression, but the face of someone who is about to commit the ultimate sin under the guise of self-defense.
He tilts his head, black liquid spilling from his eye-socket. “Pretty sure there’s already a solution for that.”
Nightmare’s face lights up. “Possibly. I need your soul.”Or: Killer realizes how messed up he really is.
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“Will anyone hear our voice?”
His free hand drifted softly to his SOUL, as if it were a fond memory.～～～～～～
On nights like these, everyone is having a bad night.
They're angry, they're sad, they're mad, they're anything but glad.But for the sake of himself and everyone else...
He lets his anger leak out in the form of his own thoughts.Chara and Frisk live inside his SOUL, while their ghosts float about.
They may be bad...
But as long as they all live together, they may as well try to get along.So looking up at the sky, they think, they laugh, and they cry,
If only for a short few moments.
Just to make it through the night. -
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Forced into Stage One after a particularly nasty raid, Killer leaves to another AU in hopes to cool down. Only to find a small furry friend waiting.
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The last thing Killer expected to be doing today would be desperately trying to keep his boyfriend alive while he attempted to take his own life. But things never went Killer's way, did they?
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Killer finds Cross about to kill himself, and does his best to keep Cross with him.
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Believe me when I say that it's me, my love when I say it Is by The_Borb_King_2020
Fandoms: Undertale (Video Game)
31 Jul 2022
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Summary
"What the f*** did you do to me?!"
Reaper sighs as he gets up and opens a portal. Killer glances into it and freezes as he sees a coffin being put into the ground, Nightmare, Cross, Horror, Dust and Error standing next to the hole that it's being put in, all dressed in black clothes. Horror Is crying, Nightmare looks like he hasn't slept in days and the rest of them look miserable.
"You died. The fall killed you."