Sorry if that sounds like I'm pressuring you, but when it comes to video game soundtracks, there is Vice City's inhumanly perfect collection of licensed tracks, there is daylight, and then there is everything else.
I'm lucky enough to own the box set of them on CD (physical media!), but now everyone can get them, and for their music playing device of choice.
Of course, it's not just Vice City's soundtrack that's up for sale (or streaming): everything is, from GTAIII to San Andreas to the Stories spin-offs to Chinatown Wars.
You can find the full listing of links below.