Xenosaga! It's not very well known, but it's one of my favorite RPGs ever. Aside from KH, that is. And yeah, most of the online forums I've been in don't know how to talk about philosophy. But it's good to have a good discussion once in a while.
It depends on what it covers! I'm not huge on philosophy but it's interesting. I picked up the book because one of my favorite video game series was based off the teachings. And I quite enjoyed the themes of the game, so I figured I'd pick up the book and see how similar they were! I was pleasantly surprised. Are YOU into philosophical stuff?