Heavy Rain

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David Cage proposed a disturbing idea in his postmortem on adventure game Indigo Prophecy. He said, "In an action game you can explain how to shoot, what weapons are used, who the enemies are, and everyone immediately understands the type of experience it is going to be. With Indigo Prophecy, no one can see right away how the player can enjoy playing with only a story and choices." (from http://gamasutra.com/features/20060620/cage_04.shtml)