"Undertale (OST Version) - Undertale is a high quality rip of "Undertale" from the game Undertale.
At 0:22, the rip become a mashup of "Undertale" and the vocals from the song "Fireflies" by Owl City. At 2:51, the vocals from "Fireflies" pause and the melody of "Night Walk" begins to play using the glockenspiel instrument used in the advertised track. At 3:01, the glockenspiel stops playing "Night Walk" and begins playing the melody of "Meet the Flintstones". At 3:12, the vocals from "Fireflies" begins playing again and "Meet the Flintstones" is played using the piano instrument from "Undertale" instead of the glockenspiel. At 3:55, "Undertale" stops playing, leaving only the vocals and the glockenspiel playing "Meet the Flintstones" to play for the rest of the rip.