Pokémon GO, the augmented-Reality mobile game released on Android devices. It is also reported that the game is now available in Japan and Australia / New Zealand.
The mobile game is free-to-play, of course with the odd micro-transactions. The game also $35 optional accessory is available and vibrates when a Pokémon is nearby. The title has not yet been released in the U.S. or U.K., though there have been field tests.