Sega has unveiled Sonic & All-Stars Racing Transformed over at IGN together with an announcement trailer and an interview with the developers of the game, Sumo Digital. The game will combine racing, flying and racing over water, which seems to be pretty familiar to Mario Kart 7. The game will include expanded multiplayer modes, Gran Prix and Battle Arena modes. It will be available for Xbox 360, PlayStation 3, PC, Nintendo 3DS and PlayStation Vita. Platform specific features have not been announced yet. Head over to IGN for a complete preview of the game, together with a first-look video.