"DUEL ZONE ~惑星のトラベラーズ~ (bonus chip mix)" is a King for Another Day Tournament track exclusive to the FIRST STRIKE ~ SiIvaGunner: King for Another Day Tournament Original Soundtrack VOL. 1 album.
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This is a chiptune arrangement of "DUEL ZONE ~惑星のトラベラーズ~ - SiIvaGunner: King for Another Day".