Undertale music
Bonetrousle The fancy nerd dance
Spider Dance Makes the best fan remixes
Death by Glamour Deserves to be in a club
Spear of Justice Gets exponentially funnier the faster it's played.
Megalovania The actual best song in the game. Needs Metallica cover.
Your Best Nightmare Usually accompanied by frantic screaming.
ASGORE Climactic Goosebumps: The Song
Ghost Fight (snaps finger in rhythm)
Dummy! (snaps fingers faster)
SAVE the World Life is pure and good.
Undertale I actually can't listen to this song without crying.