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Can You See Me Now? is a chase game. You are dropped at a random location in a virtual Rotterdam.
You use your arrow keys to move around the city. You can chat with other players by typing messages.
On the real streets of Rotterdam up to three runners – equipped with handheld computers and Global Positioning Systems – are trying to “see” you. To do so they have to get within 5 metres of your location. Once they see you, you are out of the game.
Good luck.

Read all about it.

A nice example of the convergence of play, technology, and the real world. What could you do along these lines if everyone had GPS-enabled cell phones?