RPGs tend to be focused on leveling and battle systems (think Diablo, Final Fantasy). Adventure games like King's Quest rarely involved conflict and focused more on exploration and puzzle solving. King's Quest 8: Mask of Eternity, was the first 3D entry in the series but also departed substantially from the pure exploration and story-driven elements of the earlier entries. It was a very disappointing game for me, as a long time fan of King's Quest. It wasn't even a well-done RPG.