Ready? Let's end all of this for good!
Last Goodbye is the 96th track in the Undertale Soundtrack. This track only plays during the credits after the True Pacifist Route while all the names of the Undertale Kickstarter backers are being shown while the player (as a SOUL) dodges the credits. If the SOUL successfully dodges all the credits, the Mysterious Door in Snowdin Forest unlocks.
- Toby Fox has mentioned that the piano that plays in this song is himself playing live and is his self-expression. The filename of the track fits Toby's statement.
- "There's a song called "Last Goodbye" on the soundtrack. The piano playing on that song is myself playing live. That's my self expression." - Toby Fox. January 11, 2016. Twitter