According to the announcement, the 3DS game has new levels designed specifically for that version, along with an unlockable 3DS-exclusive 'special stage.' Generations also uses the 3DS's StreetPass communication feature to unlock "bonus material" when two players' 3DSes come within communication range.
Both the console and 3DS Sonic Generations won't be out until November. Following standard Sonic protocol, we're not going to get our hopes up for either yet.
Celebrate Sonic the Hedgehog's 20th Anniversary in a Whole New Dimension!
LONDON & SAN FRANCISCO (June 1st, 2011) – SEGA® Europe Ltd. & SEGA® America, Inc., today confirmed that Sonic Generations™ will be released on Nintendo's new handheld system, the Nintendo 3DS™ in November 2011. Set across three defining eras from Sonic the Hedgehog's twenty year history, Sonic Generations™ for Nintendo 3DS will see SEGA's mascot speeding through new levels designed exclusively for the Nintendo 3DS system.
"Sonic Generations for the Nintendo 3DS will combine brand new technology and twenty years of Sonic the Hedgehog videogame heritage" commented David Corless, Global Brand Director for Sonic. "Couple this with the ability to play as both Classic and Modern Sonic and you have the perfect gaming celebration for the landmark anniversary of our much loved mascot"
The specifically designed Nintendo 3DS environments, based on iconic levels from popular Sonic the Hedgehog titles, will include an exclusive unlockable 'special stage' allowing players to become even more immersed in Sonic's world. Sonic Generations™ for Nintendo 3DS will also take advantage of the StreetPass™ feature by enabling players to collect new content and unlock bonus material each time they pass another player. In addition to this, the new two-player versus mode means fans can battle it out across some of the most recognisable Sonic environments in a completely new way.
Sonic Generations™ for Nintendo 3DS follows the same storyline as the previously announced platforms, with Sonic and his friends pulled back through time due to a mysterious new power which is causing chaos throughout the universe by creating strange "time holes". Sonic Generations™ will be available for the Xbox 360® video game and entertainment system from Microsoft, PlayStation®3 computer entertainment system and the Nintendo 3DS system in November 2011.
For more information please visit www.sonicthehedgehog.com/generations