My first favorite soundtrack from my entire life was "Mech Warrior 2: 31st Century Combat" for the PC I was vary young last time I ever played that game and (at the time) never heard a barely any of hard rock or metal yet in life.
In fact the main reason I think I got into metal and rock music in my life period was because of some of the songs on that game alone. if your looking to play it is is called "Mech Warrior 2: 31st Century Combat and I prefer the PC version of that games soundtrack,
if you like some metal mixed in with some classical you may like this soundtrack but don't go out and buy it, I would at first give it a listen on YouTube, most of the songs are not even rock through but it is still a good soundtrack anyway in my opinion
My current favorite soundtrack is The Sims series (anyone) on the PC, especially the first and second series music on the PC