Aren't you excited? Aren't you happy? You're going to be free.
Undertale is the 71st track in the Undertale Soundtrack. It plays while the protagonist travels throughout New Home and learns the backstory of Asgore, Toriel, Asriel, and the first human. It is a song harmonizing the melodies of Once Upon a Time and Memory/His Theme.
- In the game files, this song is split into two parts: "
mus_endarea_parta" and "
mus_endarea_partb." The beginning file loops while the protagonist is on the top floor of the house, and the second plays once when the protagonist enters the basement.
- The sound files play at 0.85x speed in-game, matching the speed found in the original soundtrack.
- This is the longest track in the Undertale Soundtrack, although its individual parts are shorter than Reunited.
- The original version of Undertale had a bit more somber feel and came with an entirely different guitar accompaniment. According to Toby, by hearing Redline Day, he was inspired to rework the song and write a new guitar accompaniment, which would then become the basis for Memory (and, by extent, His Theme).
- The main melody of the original, unused version of Undertale is played on a string instrument from 1:20 to 2:54.
- If a part of Undertale is slowed down by 666%, it sounds exactly like The Choice.
- This was one of the two tracks that "took the most effort to make" and are "some of Toby Fox's favorite". The other is Hopes and Dreams.
- Before the song “UNDERTALE” was completed, it went through a completely different iteration. This version sounds a bit more sad, which I think would have been less effective. - undertale on Tumblr, September 13, 2016.