- For the area with the same name, see Ruins.
- This song has a similar instrumentation and feeling to "Fortress of Ancient Dragons" from Chrono Cross. As both songs play in ancient ruins, it might have served as an inspiration.
- If you speed the song up by 2x, it sounds very similar to Spear of Justice and NGAHHH!!
- Ruins appears in tracks such as Waterfall, Spear of Justice and An Ending, among many others.
- There is an unused version of this track, called mus_ruinspiano. It is a slower piano version of Ruins.
|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|