A demo for the forthcoming 3DS title Sonic Boom: Shattered Crystal has been released onto the 3DS eShop after a surprise announcement in today's Nintendo Direct.
The game is part of a redesign for the Sonic the Hedgehog cast, and launches on 21st November alongside its Wii U counterpart, Rise of Lyric.
A special 3DS Home menu theme has also been announced, although it is currently unclear whether or not this will be free for purchasers of the eShop version.
Sonic Boom launches alongside a TV series and merchandise range this year.