"For a story to occur, it has to keep proceeding... challenge is about preventing you from continuing in the game... Story and challenge work against each other. No matter how hard you work on a game, if you've got a story in the traditional way, and you've got challenge elements like we traditionally use them, they work against each other."
-- Jonathan Blow
"All right: so what if the player's challenge and the protagonist's challenge are not the same thing? Or what if the function of the challenge is something other than doling out quantities of story? Is there a way in which challenge can make a story more powerful or more significant rather than less?"