All tracks made or collaborated on by Moonster/Moonstriker, ordered by OST number.

Second Playlist: https://soundcloud.com/epik-bruh/sets/how-has-moon-made-so-many-songs

Moonstertale (all of Moonster's tracks organized)

A collection of tracks that could be used for Undertale: Swapped Rhythms (plus some Deltarune ones too).

Undertale/Deltarune: Swapped Rhythms UST

Swapped Rhythms AU owned by: @punniester-master_2019
Songs by: @moonstrikefour

Go check out the "Swapped Rhythms" UST account here: https://soundcloud.com/swapped-rhythms
Run by: @moonstrikefour

Undertale © Toby Fox

SWAPPED RHYTHMS UST by MoonStriker

Undertale by Toby Fox
Swapped Rhythms by FwugRadiation

This soundtrack cannot be fully downloaded for now.

Swapped Rhythms - FwugRadiation

A playlist inspired by underswap 2022. Considering that only a couple of tracks were created for this au, I decided to create a headcanon version for ost on it.

underswap 2.0 (underswap 2022?)

Mystery (Ball Chime) — Toby Fox

Update: New thumbnail by @bence1114.

* that creep never stops showing up, does it?
* every time i check this place…
* that bot's always just standing there.
* makes me wonder what they’re up t-
* …
* oh…
* heh. that’s hilarious.
* next thing i know, a human falls down.
* you alright, kid?
* seems like you've had quite an event.
* name’s sans. sans the skeleton.
* i’m kind of a well-known figure at the flooded city.
* but i also take care of this old factory.
* by the way…
* i’m actually on a maintenance run right now…
* but it seems like your arrival’s an interesting case.
* why don’t you come with me?
* don’t worry, i got no *bone* to pick with you.
* i’ll gladly guide you over to my place.
* it’s got a cozy bed, some nice food...
* how’s that sound?
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Leitmotif(s):
- It's Raining Somewhere Else
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Sans takes the role of Toriel. He’s well-known among monsters in the Flooded City for his jokes and laid-back attitude. He also keeps watch over the city’s Old Factory (the Ruins replacement), because some monsters have been hanging around there in refuge from the rain and he wants to make sure everyone’s safe.

Speaking of areas, in this AU, areas swap in two ways: season-wise and aesthetics/style-wise. Here, the Ruins replacement (Old Factory/Flooded City) swaps seasons with Waterfall (Fall <> Spring), but swaps aesthetics with CORE (ruins <> factory).

Song by: @hyperflowey

Thumbnail by: @bence1114
swapshift logo by: @bence1114
Sans sprite by: @bence1114

UNDERTALE(tm) belongs to Toby Fox
Underswap belongs to the community
temmie's underswap belongs to @moonstrikefour/"Temmie Chang"
Swapshift belongs to Brenny114

Undertale © Toby Fox

swapshift - just an ordinary skeleton. (OST 4) (OUTDATED)

*(There's a festive winter wonderland all around me.)
*(Such...joy...it fills me with...determination.)
*(Interesting. Very interesting.)

Shipwrecked is a roleshift AU that makes role changes based on popular ships. These are not necessarily ships that we believe in, just ones that have some popularity within the fandom.
I'd classify the AU as taking itself half-seriously. It legitimately has its own style and ideas, but we might not do other stuff for it and it acknowledges how silly its own premise is.
The AU details a timeline after a botched reset by Asriel, in which he gets to be the protagonist, but no one remembers him. Not even his parents.
Along with the ship swaps, there are also some miscellaneous other changes just for the fun of it. For example, the Ruins are styled after Snowdin.

[Shipwrecked] Frosty Forest

underswap, a game where a truly happy ending is possible! Only if you choose so.
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Undertale was created by Toby Fox
In an alternate universe, 'Underswap' was created by Temmie Chang
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Leitmotif:
- Ruins
- Song That Might Play When You Fight Sans
- It's Raining Somewhere Else

underswap - Putting a Little More 'Backbone' into It (Trailer)

If you have any Moonstriker tracks that you would like to see on Soundcloud, DM me the link (either through Soundcloud messages or Discord [Bowser Man#9144])
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This replaces "Your Best Friend" and only plays in battle.

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Join us.
Join us.
Let us shape this world of our/my own free will.
Promise.
Promise.
You won't fall within the abyss in my side.
The absolute is lying in wait for humanity's crack of doom.
Lorem ipsum docet.
Come join the fun.

♡ Join the fun
     Do not join the fun

All hell broke loose
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You can use this track for your stuff, provided you give credit to me, the composer of the song, and link back to its original source. Please ask beforehand.
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UNDERSWAP (2022) is simply a modern version of well... Underswap. This is by no means related to my personal interpretation of Underswap and will not plan to release the full soundtrack, but will release the tracks occasionally (mostly for the unique role choices) like "DELTASWAP". In this case mainly, Memoryhead, the unknown amalgamate, swaps with Flowey the flower!
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Motifs:
- Original
- The Fallen Child
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Original release date: January 7, 2022
Title and description taken from Youtube upload (https://youtube.com/watch?v=D8zwWYcc03c)
Song by Moonster (@moonstrikefour)

[Undertale AU - UNDERSWAP (2022)] Fun

Undertale by Toby Fox
Swapped Rhythms by FwugRadiation

FwugRadiation - SWAPPED RHYTHMS Soundtrack - 06 Hey! Happy Harvesting Season~♪

FwugRadiation - SWAPPED RHYTHMS Soundtrack - 04 Heartful Guardian

[Undertale] Ball Chime As A Sonic the Hedgehog 1-up Jingle

[This track is not mine! I uploaded this because it's pretty rare.]

I'm using the Undertale thumbnail as this song is also known as the origin of the "Ball Chime" sound.

Toby Fox — mystery.mp3

Music: @its-me-again-margaret
Thumbnail: JustTheTMG

And so we began our tale...

Mystery by Toby Fox
Sonic the Hedgehog © SEGA

18- Extra Life

*Let me tell you a story about a boy who wanted to feel the sunshine.
*But first, I will tell you a history nobody has ever told to anyone before.
*Once upon a time, two races coexisted on EARTH to preserve peace and harmony: HUMANS and MONSTERS
*But... unfortunately, that did not last long.
*The HUMANS wanted power, both races waged war against each other.
*Ultimately, the HUMANS won the war, consequently sealing the MONSTERS from the face of EARTH using a magic spell, the BARRIER.
*Which no one can cross over to the surface.
*And everyone is prohibited to mountaineer MT. Ebott... or else, no hope to return.

*MT. Ebott 201X... (camera pans from the mountain to the castle in the underground)
*The Underground, 201X

*Ah, this is where I am going to tell you that story.
*The boy wondered if someday... he could be free from the eternal imprisonment.
*Therefore, he always came to the Ruins to gaze the light above.

UNDERTALE

AU Slot: Underswap: Alternative, Undertale: BETA, Any with Chara swapped with Asriel

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This can be for any au want (Chara as Asriel only), provided you give credit to original creator of the song. Please ask beforehand.
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Go listen to the other Chara!Asriel related tracks here:
Track 71 (Undertale): https://soundcloud.com/moonstriker/a-chara-asriel-swap-track-71-undertale-tale-of-the-fallen-child
Memory: https://soundcloud.com/moonstriker/a-chara-memory-tribute
His Theme (OST): https://soundcloud.com/moonstriker/a-chara-his-theme-melody-within-the-vessel-ost-version
His Theme(In-game): https://soundcloud.com/moonstriker/a-chara-his-theme-melody-within-the-vessel
Hopes and Dreams: https://soundcloud.com/moonstriker/early-300-followersa-chara-hopes-and-dreams-hopes-and-dreams
SAVE the World: https://soundcloud.com/moonstriker/300-followers-halloween-23a-chara-save-the-world-last-game-save-the-world
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I gotta do the OUaT before getting to YBN replacement for them =P Anyways, enjoy!
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Leitmotives (In-order):
-His Theme
-Original
-Your Best Friend

[A Chara and Asriel Swap - Once Upon a Time] Down Memory Lane

Thanks for your feedback.
Come again some time.
Tra la la...

Mystery's Theme

AU Slot: Underswap: Alternative, Undertale: BETA, Any with Chara swapped with Asriel

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This can be for any au want (Chara as Asriel only), provided you give credit to original creator of the song. Please ask beforehand.
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Go listen to the other Chara!Asriel related tracks here:
Track 71 (Undertale): https://soundcloud.com/moonstriker/a-chara-asriel-swap-track-71-undertale-tale-of-the-fallen-child
Memory: https://soundcloud.com/moonstriker/a-chara-memory-tribute
His Theme (OST): https://soundcloud.com/moonstriker/a-chara-his-theme-melody-within-the-vessel-ost-version
His Theme(In-game): https://soundcloud.com/moonstriker/a-chara-his-theme-melody-within-the-vessel
Hopes and Dreams: https://soundcloud.com/moonstriker/early-300-followersa-chara-hopes-and-dreams-hopes-and-dreams
SAVE the World: https://soundcloud.com/moonstriker/300-followers-halloween-23a-chara-save-the-world-last-game-save-the-world
Once Upon a Time: https://soundcloud.com/moonstriker/a-chara-and-asriel-swap-once-upon-a-time-down-memory-lane?in=moonstriker/sets/undertale-au-chara-and-asriel
Your Best Nightmare: https://soundcloud.com/moonstriker/a-chara-and-asriel-swap-your-best-nightmare-special-hell
Finale: https://soundcloud.com/moonstriker/a-chara-and-asriel-swap-finale-the-last-straw
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Did I forget about Start Menu? Nah =P
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Leitmotives (In-order):
-His Theme

Source of Image: https://vheef25.tumblr.com/post/131617352422/someone-has-to-take-care-of-these-flowers

[A Chara And Asriel Swap - Start Menu] A New Story (Full)

This replaces "Once Upon a Time"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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All the leitmotives are from "Your Best Nightmare" if you still can't tell. The 2nd part is from the unused part of it and heavily modified, though the rest is mildly modified as well. Again, it's a fan-track if not official.
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://sasuisgay.tumblr.com/post/142091733012/velocesmells-once-upon-a-time-i-tried

Youtube: https://www.youtube.com/watch?v=yRcbsS_rdgQ

[Undertale AU][Swapped Rhythms] In Times Gone by...

This replaces "Menu"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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I tested the new "Magical8bitplugin" VST and I'm honestly really digging it! Anyways, here's my 2nd "Start" remix after the one I composed for my "Chara and Asriel Swap" project!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://wolven0ne-universe.tumblr.com/post/176778132058/an-endlessabyss-guys-ill-open-commissionssss

Youtube: https://www.youtube.com/watch?v=v_CkezkS1Qo&feature=youtu.be

[Undertale AU][Swapped Rhythms] Select Screen (Full)

Undertale by Toby Fox
Swapped Rhythms by FwugRadiation

*In times of yore, two unique kinds were risen to care for the EARTH: HUMANS and MONSTERS.
*In the aftermath... it became the worst nightmare for both of them.

FwugRadiation - SWAPPED RHYTHMS Soundtrack - 01 In Times Gone by...

Undertale by Toby Fox
Swapped Rhythms by FwugRadiation

*Share your dream with us!

FwugRadiation - SWAPPED RHYTHMS Soundtrack - 02 It's Time to Do Your Best!

FwugRadiation - SWAPPED RHYTHMS Soundtrack - 03 Theme Of Friendship

FwugRadiation - SWAPPED RHYTHMS Soundtrack - 05 Wander Inside the Ancient Relics

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.

Deepertale logo by @creepabotinc
Deepertale is considered to be a satellite AU of the Aftergore series, the Discord server of which can be found here: discord.gg/WbzykND
Deepertale is owned by @slick_silver

[Deepertale] In Memoriam

Special thanks to @moonstrikefour for this contribution!
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Branch 1 (titled "The Divided Underground") details an ending where the human abandons their plans of genocide after their confrontation with Sans in Snowdin. They treat everyone they meet from that point onward with kindness; leaving monsterkind divided on their opinions about humans. With tension among monsterkind rising day by day, and with Queen Undyne's attempts to reunite monsterkind continuously failing; how will the underground react to a new fallen human?
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We have a Discord server, come say hi! - discord.gg/hy4B74jBzq

Disbelief: Aftermath [Branch I] OST - Their Story So Far... (Contributed by MoonStriker)

Have to read the sheets. Have to rest for a whole day.
Delay through switching.

Not exactly an alternate universe. It's moreso merely a motif-swap project that can replace the original song files. 

Account run by: @moon5triker
Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019

FwugRadiation - SWAPPED RHYTHMS Soundtrack - 06 Hey! Happy Harvesting Season~♪

RhythmicalNutrition