If you're into instrumental music at all, then I'd recommend the Silent Hill 2 Soundtrack. Playing the game is not essential at all and the music is nice to listen to anyway. It has a variation of moods from metal (Angel's Thanatos) to piano (Theme Of Laura (Reprise)) and everything in between. Unlike most video-game soundtracks, it does not contain shitty quality that is associated with retro-gaming, nor does it have dance/techno/electronic/etc music. If you like only one type of genre, then you'll find one or two songs you'll like but it's only if you appreciate a variation of music that you'll fully appreciate it. Especially considering there's 30 songs on the single CD.

Which clearly makes it the best video-game soundtrack (not to mention that it's the deepest game you'll find).

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Edit: Hahaha, haha.