Official undertale: shattered souls soundtrack named "Choose your name." was created by BenyiC03, you can find it in his soundcloud account.

[BenyiC03] Choose your name. | Name select theme

Official undertale: shattered souls soundtrack named "The menu" was created by Wormi.

[Wormi] The menu | Menu theme

Official undertale: shattered souls soundtrack named "Extras" was created by Alminum.

Official Undertale soundtrack that was created for alphys lab, but toby fox never used it, so we decided to take it as our achievment theme

Official undertale: shattered souls soundtrack named "Credits" was created by BenyiC03.

This is official Undertale Shattered Souls soundcloud account, all soundtracks will be available here!

Discord server:
https://discord.gg/zjXtdSdW9x