Sega's confirmed that Project Needlemouse, the new 2D HD Sonic game, will be based on the speedy hedgehog alone.
There will be no inclusion of new characters in the game, nor will there be any other playable characters for the game.
The company also showed the game's first piece of concept art, featuring a Crabnik.
It's due out later this year for Xbox Live and PlayStation Network. Game was announced in September last year.