Have you ever watched a movie or read a novel and wished you could change the plot to save your favorite character? Game designer David Cage lets you do just that in his video games, where players make choices that shape an ever-changing storyline. In a talk and live demo, Cage presents a scene from his new project in which the audience can control a character's choices. "Interactive storytelling can be what cinema was in the 20th century: an art that profoundly changes its time," says Cage.

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