"Reunited" is the 92nd track in the Undertale Soundtrack. It is primarily based on the melodies of "Once Upon a Time," "Snowdin Town," "Shop," and "Dating Start!." It plays at all times during the epilogue at the end of the True Pacifist Route, except while inside Papyrus's room, when interacting with the television in Papyrus and Sans's House, when in the Dog Room, when talking to Ragel, Endogeny or Greater Dog, and when in "
- This track is slowed down when played in-game (compared to the file version), just like many other Undertale tracks, however, if the protagonist enters Papyrus's room and exits back out, the track starts playing again, however at the same speed as the file.
- This is the second longest track in the Undertale Soundtrack, next to "Undertale."