Kindle
Guy says: "Perplex City is a cross between collectible-card game and Alternate Reality Game. It's centered around a stolen artefact, and there's a $200,000 reward for whoever can find it. The cards themselves are rather beautiful and feature a diverse range of mind-bending puzzles, while Anton Bogaty (who you just featured) does much of the artwork for the game. I think it's primarily worth mentioning because it's the first self-supporting ARG, as opposed to marketing something else (or being made on a lo-to-no budget basis.)
"Also, Boing Boing itself is on one of the cards!
"There are also some live events coming up in New York and London, making it especially news-worthy right now - anyone can participate, as they aren't especially about PXC, just friendly puzzlin' competitions. Although the London event is closed to sign-ups, after 600 people applied..."
Link
(Here is Guy's quick-start guide to the game.)