Yasunori Mitsuda went full orchestral sci-fi opera for the first Xenosaga and it sounds massive. This PS2 soundtrack carries the weight of a game that desperately wanted to be a movie, and honestly the music sells it. "Song of Nephilim" is haunting in a way that genuinely unsettles you, this eerie choral piece that sticks in your brain for days.
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"KOS-MOS" builds with this mechanical precision that mirrors the character perfectly. "Shion ~Memories of the Past~" is just heartbreaking, pure piano vulnerability. The battle theme goes harder than you'd expect from something this story-heavy.
If you grew up on PS2 RPGs and somehow skipped Xenosaga, the soundtrack alone tells you what you missed.