This recent article inspired many people to respond to what are the game influence in the pervasive theater:
The center of the discussion is around what level of interactive is appropriate to be called a game.
Is it ok just chase the actors around?
Can you call it a game because you get to assemble your own experience?
Is the LARPing the closest thing to a theater/ game hybrid?
How would you provide a world exploration experience?
Another article of the same topic provide more insight on marrying gameplay and theater:
http://www.eurogamer.net/articles/2014-04-30-how-punchdrunk-created-a-virtual-world-in-the-heart-of-central-london
maybe sometime we overlooked simple game mechanics can provide a variety playfulness to live games