felipepepe you ruined my childhood memories! Silver is horrible! (Well, technically, I wasn't a child anymore, when I played this game for the 1st time, but it was a long time ago).
In all honesty, though, Silver is not an RPG, by any stretch of imagination. There is no character development (there is some progression, but it all happens automatically), combat is completely action oriented and its controlls and mechanics rather bad; the dialogues just play out: you have no infuence on what the characters say whatsoever, there is absolutely no minignfull C&C (at least so far and I'm half way through the game), the story is as bland as it gets... I... really...
Silver is an action adventure, and not a very good one, if you ask me. I really have a lot of love for this game, out of nostalgia, but I honestly don't think it's a good candidate for your book.
Why did you decide it's worth including on the list? Maybe I'm missing something. Was it because you believed it kind of bridges the gap between console and PC RPGs?