Exploring the Wilderness
From ONISM1999
Exploring the Wilderness is a theme which briefly plays while the party heads to the Radio Tower to play the record during Chapter 4. It was composed by Hiroki Kikuta and produced by Kikuta and Andrew Allanson. Its original name, The Essentia 2000 Arrives, implies that it originally played soon after The Essentia 2000 is freed from the Death Cab.
It was featured on the YIIK: A Postmodern RPG Official Soundtrack and YIIK: Monsters and Androids.