RPGs are a tough genre to define. I don't know that we actually have any RPG video games at all. Dragon Age: Origins is probably the closest thing but even that falls short of the base concept of pen & paper RPGs which is about creating a story as a character. JRPGs and western RPGs are not much more RPG-like than movies or choose your own adventure books even though you're meant to identify with those characters. Adventure Game is probably a more accurate title for all of them.