Fan song by Bob.T.C.
Remake: https://soundcloud.com/madness-determination/thorns-of-agony
Edited by me.

Deltarune Ch.3 UST - BATTLE AGAINST A FORGOTTEN PRINCESS -  Superboss Theme

Fan song by Bob.T.C.
First version: https://soundcloud.com/madness-determination/battle-against-a-forgotten-princess
Edited by me.

Deltarune fanmade song 『THORNS OF AGONY / 苦悩の茨』 Vs. Flowey

Cover by Glazko of a fansong by DruidPC and KateBulka.
Edited by me.

Cover of Lizz Robinett's cover of MOTHY's song by Siderea.
Edited by me.

Remix by Jot of a deleted soundtrack by GSO.
Edited by me.

Old Undertale remix by Century Gothic.
Recovered and edited by me.
Remake: https://soundcloud.com/madness-determination/undertale-anime-opening

Remake of an old Undertale remix by Team Konsei.
Original: https://soundcloud.com/madness-determination/centurion
Edited by me.

Undertale medley remix by Jeffrey Watkins.
Edited by me.

A good pirate always gives credits to the original composers