- The artbook mentions Ghost Fight is inspired by the battle music from the RPG OFF, and was composed before Undertale existed.
- The song is played at a lower pitch in the Fangamer Demo.
|Undertale Demo Soundtrack|
|1 - 10|| Once Upon a Time • Menu • Your Best Friend • Fallen Down • Ruins|
Anticipation • Unnecessary Tension • Enemy Approaching • Ghost Fight • Determination
|11 - 16||Home • Heartache • End • Nyeh Heh Heh! • Home (Music Box) • Empty House|