(Disclaimer: This playlist may contain some LOUD and SCARY au themes of the ruins theme from Undertale that is maybe not suitable for people under 18+. Please make sure to moderating your loved ones and be careful, thank you!)

A collection of every existing Undertale au interpretations of the Ruins I can find on Soundcloud. I'll keep updating this playlist with newer au themes and songs maybe each week if possible.

Art by Cocoa Ando: https://x.com/nyusu_UT

An Ruins Undertale AU Compilation Mix 2025

-You go through the door into next room.
-There's a computer and a closed door.

Alphys:

*There should be a computer panel somewhere in this room, use it.
-you turn it on, it's a game.

*It's a puzzle (or a game) that was made for security reasons by… my old friend.
*I still use them, to keep the…
*It's easy, you just have to move this block in the middle and shot the arrow at the top.
*It's simple enough (i think).


Undertale by Toby Fox
Legend of the Isle by @iko-oki-4274
composed by @diwad3956


LotI OST 007 - Empty Lab

I'm not sure if this one's as effective as the original, but I had a lot of fun composing it, gave me a chance to try out new stuff.

005 - Ruins

The unused version of the track "ruins", Reused (?) in the Undertale: Bits and Pieces mod.

Composer: Toby Fox

Ruins Piano

Undertale Official Soundtrack - Full Game

Play the game here!: https://undertale.com/

UNDERTALE Soundtrack

Ruins

CREDITS:
Full song by: @dashingtoadie-the-sequel
-----

[* this is the ruins replacement of my au.]

* The shadow of the ruins looms above, filling you with determination.

[* credits to chara for writing their dialogue.]

005 - ruins.

Let me tell you a legend.
Legend of Ebott Island.
Once happy and peacuful place,
Struck by the unforeseen cataclysm by one individual's mistake.
An Island trapped between World of Hope and Realm of Dreams with its citizens screaming for Freedom.

Now, my Knight your task is to bring this story to an end.
Lead this story to the ending you see fitting most. 
 Will you take the Offer?

YES     ♥️     NO

Legend of the Isle is an Undertale roleswap au encompassing many Ideas and elements inspired by Deltarune, with an unusual set of swaps mostly keeping characters relationships in tact, story written on the principle of "fit the story to the characters". 

UNDERTALE by Toby Fox

Legend of the Isle by @iko-oki-4274