Turrican
Turrican II

Advance Wars

Menu Theme
Nell's Theme
Andy's Theme
Olaf's Theme
Max's Theme
Sami's Theme
Kanbei's Theme
Sonja's Theme

Mega Man 1-9
Mega Man X-X8 and Command Mission
Mega Man Zero 1-2
Legend of Zelda: Twilight Princess
Legend of Zelda: Skyward Sword
Mario Kart 7
Gunstar Heroes
Sonic the Hedgehog 1, 2, 3+Knuckles
Sonic CD (US and JP soundtracks)
Secret of Mana
Kirby 64
Kirby's Return To Dreamland
Castlevania III and IV
---Symphony of the Night, all GBA and DS Castlevania games
Legend of Dragoon
Final Fantasy VII
Goldeneye 007 (N64)
Perfect Dark
Fire Emblem: The Sacred Stones

Lots of good music in all of those games....

Sonic The Hedgehog - "Green Hill Zone"
Sonic The Hedgehog - "Invincible"
Sonic The Hedgehog 2 - "Emerald Hill Zone"
Sonic The Hedgehog 2 - "Chemical Plant Zone"
Sonic The Hedgehog 2 - "Special Stage"
Sonic The Hedgehog 2 - "Boss
Sonic The Hedgehog 2 - "Super Sonic"
Sonic The Hedgehog 3 - Angel Island Zone, Act 1
Sonic & Knuckles - "Mushroom Hill Zone, Act 1"
Sonic CD - "Sonic Boom"

I just remembered one I completely neglected to put down originally for some reason.

The soundtrack for Kameo, especially the Hero's Theme.

It sounded completely epic and amazing and really boosted the experience of the game.

X-COM: UFO Defense - Dogfight
X-COM: UFO Defense - Geoscape 1
X-COM: UFO Defense - Geoscape 4
X-COM: Terror From The Deep - Geoscape 2
X-COM: Terror From The Deep - Battlescape (Commence shitting of pants)