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Images: Alternate reality games unfold

Clues on "Perplex City" and coded postcards found in Bologna and North Carolina blend real-world signs and storytelling.

Alternate reality games unfold

A postcard, replete with coded messages, found separately in Bologna, Italy and North Carolina.

Credit: Tranzed.net

postcard

Alternate reality games unfold

An image from the Perplex City Web site.

Credit: PerplexCity.com

Perplex City