More on Perplex City: This sounds really, really fun. Great name, too.
[…] the gist of Perplex City is that you buy packs of six cards for $5 a pack and enter a world of puzzle solving, interactive fiction, and real-world/fantasy crossover.
Each Perplex City card has a puzzle on the front. Sometimes the puzzle will lead you to a faux corporate website or blog with additional hints. By entering your answer on the Perplexity website, you get points and can compare your ranking with other players.
There’s a lot more information at the link above.