There are quite a few Sonic games available on Android, but today marks the first appearance of the Blue Blur's original adventure, Sonic the Hedgehog. Sonic's first adventure has been updated for mobile devices, adding widescreen support, a remastered soundtrack, leaderboards and more. Furthermore, a brand new addition will allow users to play as either Knuckles or Tails. This new feature is also being added to the iOS version of Sonic the Hedgehog via a free update.

The game hasn't appeared on the North American Google Play store as of this writing, but it's slated to arrive today for $2.99.
http://www.joystiq.com/2013/05/16/so...android-today/