Ridge Racer Type 4 - I use this in so many xbox racing games its not even funny. That is honestly one of my favorite sound tracks ever. I love the slick jazz vibe of the entire thing. It was the very first Videogame Soundtrack I ever purchased, for 32 bucks no less. Had to import it, bought it around the time RRt4 came out because I couldn't get the songs out of my head.
Chrono Cross - came as a pre-order, just a few songs; but I bought the import of this too.
Jet Set Radio - downloaded the game on DC a few months before Jet Grind Radio came to the states, I couldn't wait, sue me (I did buy it when it released here). OMGWTFPwned! Pre-ordered to get the new tracks that would be in the US release. And then got the soundtrack for the Japanese songs. Love the original music, the us tracks stink

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Silent Hill 3 - came with it
God of War - Soundtrack came free with the game ^_^, just had to connect to Connect and use the free code.
I have some others, but I can't find them right now....and yeah I have all my music (soundtrack or not) on PC. But I'm only listing what I own here ^_-.
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You should never underestimate the predictability of stupidity.~
Bullettooth Tony (Snatch)