Any Final Fantasy game I've played has always had a excellent OST, well for me I ejoyed them
altho the song that stands out the most will be Liberi Fatali from the opening of Final Fantasy VIII(still my fav FF opening)just brilliant
Total Annihilation is one of my fav games of all time and had a awesome OST, fitting for the game.
also can't believe no one has mentioned Command and Conquer, first one that is. Now this OST is classic, Mechanical Man, Hell March, Full Stop! gets the blood pumping