Thunder Spirits - SNES - Has anyone heard of it? It's a kinda obscure side-scroller. Crappy graphics, even for the early SNES games, but it has great music. Each stage and boss has their own distinct theme. I would love to find the OST for it
Although, it's already been mentioned, Darius Gaiden has some great sounds. The really nice thing bout it is, the music tracks are red book audio so you can buy the game and burn the tracks with no problem. I regret not picking up a second copy to act as a music CD, back when it was in the bargin bin at Toys R' Us.