Prologue (XS1)

Prologue is Disc 1, Track 1 on the Xenosaga Original Soundtrack, Disc 1, Track 2 on the album, and Track 1 on the DigiCube original Xenosaga music CD.

It plays as the music in the opening cutscene, when Dr. Masuda and his team discover the at Lake Turkana in the year 20XX A.D.