I've actually been working on a comprehensive list of all my favorite videogame soundtracks for personal reference and suggestions for others, but it's...massive, and I'll never finish it, so I'll just list a small fraction on of them here... Yeah....I listen to a lot of this stuff...
NES
Silver Surfur(Stage 2)
SNES
- Rudra no Hihou(Battle of the Fields)
- Gundam Wing Endless Duel(HeavyArms Stage, Wing/Wing Zero Theme)
- Seiken Densetsu 3(Nuclear Fusion, High Tension Wire)
PS2
- Tales of Legendia(Tomorrow Will Surely Be Sunny, Enemy Attack)
- An Cinniuint(Battle With the Devil)
GAMECUBE
- Final Fantasy Crystal Chronicles(Endless Sky)
XBOX 360
- Viva Piniata(Day 4)
PS3
- 3D Dot Game Heroes(Main Theme)
WII
- Red Steel 2(Main Theme, Ambush)
- FF:Crystal Chronicles: The Crystal Bearers(Crystal Bearer's Ramble, Zu Ambush, Hidden Tales of Adventure)
3DS/DS
- Hey Ice King, Why'd You Steal Our Garbage!?(Party in the Clouds, Chillin With My Bro, Main Theme)
- Suikoden Tierkreis(The Plain and the Sky, Sally Beacon)
- Time Travellers(Main Theme)
- Code Of Princess(Solange's Theme, Ali's Theme)
PSP
- Cladun/X2(Earth of Wind and Blood, Slicing Wind, Elegant Gypsy, Rose De Sahara)
EDIT: God Eater. How could I forget God Eater?(Flame Dance, Voice of the Blizzard)