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Murder Time Trio is a group that consists of murderous sans' from other AUs. The concept revolves around the "Bad Time Trio" concept except all the team characters are replaced with Sans' that are murderous.


There is no "canon" backstory to Murder Time Trio. What I mean is, since 刀剣神居Undertale AU is the creator of Murder Time Trio and if they make an official backstory for it, that will be considered as the canon.

Just to make this part of the page not seem so worthless, there will be two interpretations of the backstory, which are:

  • Fanon Backstory
  • Canon Backstory

Fanon Backstory:

This backstory is more common, although not canon.

One day, Nightmare!Sans sought out to make a group of four murderous sans'. He first found Killer!Sans which acted as the team's "leader". Eventually, he found the other three sans' which were Murder! sans, Horror!Sans, and later Insanity!Sans. In the fanon backstory, Insanity!Sans is more commonly called as a "backup" for Horror!Sans.

Canon Backstory:

This backstory is based off of the intended backstory for Murder Time Trio made by the creator, 刀剣神居Undertale AU

Unfortunately, I cannot find any official sources for anything relating to the canon backstory of Murder Time Trio, so this section of the backstory remains unknown for now. If you know the canon backstory to Murder Time Trio, feel free to edit it here!

OST Link

Official Murder Time Trio OST link: https://www.youtube.com/watch?v=_DgCNK1Sv7E

New OST Link

Remastered Main Menu: https://www.youtube.com/watch?v=6189PAbtX-A

Game Over: https://www.youtube.com/watch?v=9Q39Nt-o_p8

Remastered Rain of Dust (Phase 1): https://www.youtube.com/watch?v=6qZJ39HS9xs

DELETE (Phase 1.5): https://www.youtube.com/watch?v=x2Lm7qsRPGM

Remastered Triple The Insanity (Phase 2): https://www.youtube.com/watch?v=yZP1rPntytg

Remastered ✡☜❄ 👎✌☼😐☜☼ (Phase 2.5): Has not come out yet.

Remastered The Satsujinki (Phase 3): Has not come out yet.

Remastered Jigokunogoka (Phase 4): Has not come out yet.

Remastered ??? Phase 5: Has not come out yet.

Remastered Rain of Dust 2 (Rain of Dust Hard Mode) (Phase 1 of Murder Time Trio Hard Mode): Has not come out yet.


Rain of Dust (Phase 1):

Horror, Murder and Killer are all set to kill you.

DELETE (Phase 1.5):

Horror is Deleted.

Triple the Insanity (Phase 2):

Insanity comes in. Murder’s pupils and Killer's eye sockets turn red. In the fanon version, the explanation of this is Insanity somehow got control of them.

✡☜❄ 👎✌☼😐☜☼ (Phase 2.5):

Note: The Wingdings Translate to YET DARKER

In this short cutscene, we hear Gaster's theme and some Wingdings up on screen, which probably means Gaster intervenes and makes an entrance.

The Satsujinki (Phase 3):

A good guess on this phase:

Insanity and Killer die, and Murder is the only one left alive. With Gaster's help, Murder Sans absorbs Killer and Insanity's dust piles. Now being a merged being, a new sans comes into the fight, Satsujinki!Sans.

Jigokunogoka (Phase 4):

The player lands a hit on Satsujinki!Sans, but it does not kill him. His left eye goes from red-light blue, to green-violet. You're now gonna have a mad time more then ever.

??? (Phase 5):

Satsujinki!Sans melts due to an overload of determination and becomes an amalgamate.

Hardmode "Rain of Dust 2" (Bonus Track):

Murder!Sans, Horror!Sans and Killer!Sans are now in their Hardmode states.