Sonic Lost World was a Wii U-exclusive Sonic game released in 2013 (alongside a seperate 3DS game bearing the same name). It was known as a competent if unremarkable platformer, but now it’s finally coming to another platform. A pre-order is available on Steam, and the game is scheduled for release on November 2, 2015. Sega is also running an offer where pre-ordering the game gets you a copy of Sonic & All-Stars Racing Transformed for free.
According to the Steam page, Sonic Lost World features full compatibility with Steam features: Achievements, steam Cloud, leaderboards, and full controller support are included.