Eternal Darkness is a good game, and is an RPG in the sense that you have health, mana, and sanity meters. Regardless of its genre (horror/3rd Person shooter/RPG) it's frek'n sweet. As you battle on, your character grows insane, which spawns multiple effects. There nothing better then walking into a room, only to fnd your arms are falling off, or that the walls are bleeding and the statues are following you. So, not a true RPG, it is an extremely good game.
Hard to find though... I got my from amazon because GAMESTOP didnt have any...