This is a collection of the Undertale au songs made by amazing artists with more high quality, more original, and less loud themes using Sans's Leitmotif theme like "MEGALOVANIA" and "Song That Might Play When You Fight Sans" and many other themes that are pleasant to listen to!!
Some songs with the Sans leitmotif are still missing and will be replaced in the future maybe.  I might make this into a mod maybe who knows!
I will be using all the songs by other creators to create a mod for the Au of course and crediting them for it as well.
So ENJOY!!

SansTale: Remastered Edition 2025 OST (In Order)

additional songs

POLYSHIFT is a series of shift AUs made by Cozmo, based on Storyshift and its further-shift variations. It is a parody of T-SPIN, but I can be sure that there will be more than just that.

Trishift is based on Tripleshift.

Roles:
Frisk - Tatum
Asriel - Asgore
Chara - Toriel
Flowey - Flowey
Toriel - Napstablook
Napstablook - Sans
Sans - Undyne
Papyrus - Alphys
Undyne - Asriel
Alphys - Chara
Mettaton - Papyrus
Asgore - Mettaton

Trishift OST

002 - Shortcut

* so that's it, huh?
* can't believe it came to this...
* things coulda been a lot easier, kid.
* but you pressed and pressed.
* heck, i bet this ain't your first time here.
* the way you knew exactly what made undyne tick.
* heh heh heh...
* well, i guess that doesn't matter now.
* we're at an ultimatum.
* all i need is your SOUL.
* i'll be quick, okay?

77 - Festering

this is based on this old weird flp edit i made https://www.youtube.com/watch?v=Y8_8pmGo1vU

i felt like updating that into a proper it's raining somewhere else styled once upon a time replacement. if this is for any au it's my one that's technically a storyspin take, but in reality i made it on my own as a reversed storyshift in 2016 before learning that was just what storyspin was. (does that mean im technically the creator of storyspin??? maybe???)

youtube link: https://youtu.be/16qmSs4Xfdc

sans once upon a time

* heya kid.
* oh yeah, watch out for those things, they got discontinued forever ago.

* anyways, name's sans. sans the skeleton. by the way, you're in the underground if you haven't figured it out yet.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
"The off-beat RPG where no one’s too far gone to be saved"

UNDERTALE by Toby and associates
STORYSWAP by Shionbluu

OST 4 - sans.

yt version: https://youtu.be/5Hn-qT0RRks

motifs:
LIFE (Neuro-sama) youtu.be/MDc1mjrIsPM
Penumbra Phantasm (Toby Fox)

LIFE open-vocals provided by Superbox (full credits on youtube)

thumbnail by me
discord.gg/8ry5dn3UjA

(V2) LIFE - Penumbra Mix

[DUSTTALE: HOTLAND ENCOUNTER]|- SUNBURN

THROUGH THE BLIZZARD V2

After a long night of dreams, it's time to wake up.
Good Morning, DELTARUNE

Waking Up

Volume 1 has concluded.
Volume 2 is next.

VOLUME 1 End

Long ago, two races ruled over Earth: HUMANS and MONSTERS.

After a long battle between them, the humans were victorious.

They sealed the monsters underground with a magic spell.

Time passed.

King ASGORE and Queen TORIEL ruled in peace.
They grew old... and vanished from the throne.

No heir was chosen, No plan was made.

Without them, old tensions returned.
Factions rose. Promises broke.

Many years later... 

MT. Ebott 202X. 

Legends say that those who climb the mountain never return.

POLYSHIFT is a series of shift AUs made by Cozmo, based on Storyshift and its further-shift variations. It is a parody of T-SPIN, but I can be sure that there will be more than just that.

Trishift is based on Tripleshift. You can check the playlist (soundcloud.com/polyshift/sets/trishift-ost) for the most up-to-date versions of the rolelist.

Falling Down

* Ha, look at you.
* As if I actually threw a spear or something.
* You’re a human, right?
* . . . What a joke. At this time?
* I’m Undyne. Just . . . Undyne.

* I guess it was my duty to kill you guys and take the soul, but . . .
* I don’t really care about anything anymore.
* Why won’t you just pass by me and fuck off.

POLYSHIFT is a series of shift AUs made by Cozmo, based on Storyshift and its further-shift variations. It is a parody of T-SPIN, but I can be sure that there will be more than just that.

Trishift is based on Tripleshift. You can check the playlist (soundcloud.com/polyshift/sets/trishift-ost) for the most up-to-date versions of the rolelist.

Undetermined, unhired Undyne occupies Sans' role. After losing a power struggle against Mettaton, she couldn't left as the guardian of Waterfall anymore since the new king has exiled her to a cold town. With almost nobody left on her side, she's living a quiet life.

Wake Up, Do Nothing, Go Sleep

POLYSHIFT is a series of shift AUs made by Cozmo, based on Storyshift and its further-shift variations. It is a parody of T-SPIN, but I can be sure that there will be more than just that.

Trishift is based on Tripleshift. You can check the playlist (soundcloud.com/polyshift/sets/trishift-ost) for the most up-to-date versions of the rolelist.

Sans is a bit lonelier since he barely meets his brother, who is busy doing the king's manager work. In this depressed world, he is trying to make everyone laugh again, by his comedy.

wassup.

* . . . HUMAN.
* STAND RIGHT THERE. DO NOT MOVE.

* . . . YOU DIDN’T BRING ANY CAMERAS HERE, DID YOU?
* GREAT. YOU CAN MOVE NOW.
* SORRY FOR THAT HASSLE.
* A BREAK IS NECESSARY IN THIS BROADCASTED, FAKE LIFE.

* . . . HA. WHAT A GUEST WE HAVE TONIGHT.
* DEFINITELY LOST IN THIS LONELY NIGHT . . .
* . . . IN THIS WORLD OF IRONY.
* LUCKY YOU, I ADORE YOUR SENSE OF HOPE.
* THAT’S SOMETHING I HAD LOST A LONG TIME AGO.
* NEVER TRY TO LIVE A LIFE OF A PROCLAIMED HERO.
* TOOK ME LONG ENOUGH TO REALIZE THAT IT . . . HURTS.

* YOU KNOW WHAT WE MUST DO.
* WHEN YOU ARE READY, COME INTO THE NEXT ROOM.
* . . . CAMERAS WILL BE THERE.

POLYSHIFT is a series of shift AUs made by Cozmo, based on Storyshift and its further-shift variations. It is a parody of T-SPIN, but I can be sure that there will be more than just that.

Trishift is based on Tripleshift. You can check the playlist (soundcloud.com/polyshift/sets/trishift-ost) for the most up-to-date versions of the rolelist.

Mettaton is the king of the Underground. Despite all the things that were in his way, he finally made it. But he, even though he made his goal into a reality, seems to have some deep concerns inside of him.

Life is Not A Show

*oh. heya.
*you're a human, right?
*man...that's hilarious.
*you can call me...buddy.
*your buddy, buddy the bud.
*how's that sound?

Deepertale is an AU that takes place in the aftermath of a nearly complete Genocide Run. Alphys has hidden all the survivors in the True Lab. Flowey was the only one who got in the human's way and lived to tell the tale (and that was by escaping within an inch of his life). The human has chosen not to erase the timeline yet, and walks the dusty Underground while down further below the monsters cower in fear. Sans takes the role of Flowey. How did he manage to get that kind of form if he was killed? Well...all will be explained in due time.

Logo by @creepabotinc
Sprite by Toadie

Deepertale is considered to be a satellite AU of the Aftergore series, the Discord server of which can be found here: https://discord.gg/WbzykND

[Deepertale] somebody came.

POLYSHIFT is a series of shift AUs made by Cozmo, based on Storyshift and its further-shift variations. It is a parody of T-SPIN, but I can be sure that there will be more than just that.

You can find role lists for three shift variations from their own playlists.