Deltarune Chapter 4 - All organ piano secret songs

These are all the songs you can play on this piano and get a comment from your party members. I saw the list of these straight from the code, so I believe it's complete, but please let me know if you find any more! edit: oh god this is actually getting views. so I should say thanks to KockaAdmiralac for datamining the list of songs :D also pssst while I have you. the deltarune wiki moved off of fandom, it's on https://deltarune.wiki/ now, go there for your info please it's way more complete and does not have ads There's 3 songs (edit: now two) that I don't know what they actually are... any help figuring them out is appreciated ^^; 0:00 Memory 0:14 Your Best Friend 0:25 Annoying song? (don't know what this is) 0:43 The Legend 0:54 Don't Forget (but slightly off for some reason) 1:16 Lost Girl 1:29 Rouxls 1:43 Gerson...? (Spear of Justice maybe) 1:53 Heartache 2:06 Messing around (one I don't know, Chopsticks, Heart And Soul) 2:41 Undertale 2:52 Dark Sanctuary 3:10 Correct melody, without octave switch 4:00 Correct melody 5:05 Megalovania