14th) Which RPG do you prefer for open-ended campaign play?
Honestly this is another question where I think almost any with the exception of those designed for one shots (Fiasco etc). As I’ve already mentioned my I’m moving away from open ended play towards more focus story arcs but I think I could still run an open ended campaign so long as there was a big epic background plot that played out over the course of the game.
Torg would be a good example, no matter what the individual is adventure is the setting explicitly includes the invasion of the world by other realities. For anything else I think I would go the approach of multiple story arcs rather than open ended play. The Dresden Files novels would be a good example of this, each is self-contained but slowly come together as part of a larger narrative and rather than play it as one campaign I’d probably do it as a series of games, with each arc buffered by short breaks and other games.