I have seen the light, and I want more like it! without the shadow of a doubt in my mind I can tell you that Ico is the best game to have ever walked this earth, if an emotionally draining, enigmatic and frustrating one (the frustation makes it fun, somehow, seriously.) If you've never heard of it or played it, buy it. BUY IT NOW!
There are a lot of questions left open, especially in the US version but that's part of the tiring and almost irratating fun. Of course, caling it frustrating and irratating is a little weird considering I'm trying to extol its infinitude of virtue, but you'd really have to play to understand. Anyway, look under puzzle games if your trying to rent and/or buy it (it's for the PS2, by the way.) Little old and pretty unpopular, but it's worth hunting down.