I'm not talking your average compilation of various songs for a game. I'm talking music made for the game.
As of now my favorites are
1) Guild Wars : Factions
2) Sonic the Hedgehog 2
3) Sonic the Hedgehog
4) The Elder Scrolls 3 : Morrowind
5) The Elder Scrolls 4 : Oblivion
Can you guess who my favorite composer in gaming is? :P