"Nyeh Heh Heh!" is the 16th track in the Undertale Soundtrack. It is an upbeat song with an 8-bit sound. In addition to being Papyrus's theme music, this track is part of an easter egg that plays at the end of a Pacifist Run of the demo, playing during and after Sans and Papyrus's conversations.
- According to an interview with Toby Fox, this was one of the six songs originally composed for other projects. The other five were "Fallen Down," "Heartache," "Bonetrousle," "Another Medium," and "MEGALOVANIA."
- The title of this song is Papyrus's catchphrase. In the Epilogue of the True Pacifist Route, Monster Kid says this if the protagonist saved them during the bridge sequence.
- ↑ "I've been kinda, doing some thinking... Maybe Undyne... Isn't actually as cool as we thought. She's just kinda... mean. But YO!!! I just found out about someone WAYYY cooler!!! Nyeh heh heh!!!" Monster Kid
|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|