Wolf Fang - Kuhga 2001(ウルフファング 空牙2001)-Requiem - To Nameless Heroes 

Released in 1991 in arcades and 1996(PSX)/1997(Saturn) for consoles.It is also known as Rohga: Armor Force outside of Japan.Composed by Hiroaki Yoshida and Akira Takemoto.This is the second game in the Kuhga trilogy the first being Kuhga -- Operation Code Vapor Trail(Vapor Trail: Hyper Offence Formation) and the last being Skull Fang: Kuhga Gaiden.A great mix of PCM and FM synth,an awesome soundtrack for an awesome game.
For the whole soundtrack go to:
vgm.mdscene.net...