Comment by jhbadger

That style of book led to one type of solo adventure -- the "numbered paragraph" type that is basically a choose your own adventure book except that combat and other such situations are resolved using the RPG rules. Those still exist, but more recently, the goal is to make things more open ended and flexible, at the cost of having the player make decisions on what things mean -- like the player might roll on some tables that say "orcs" and "merchants" and the player needs to invent their own explanation of what that means -- do they encounter orcs attacking merchants? Or orcs who are merchants?