Project Sonic 2017 is the tentative title of an upcoming platform video game in the Sonic the Hedgehog series which is being developed by Sonic Team and to be published by Sega. It is scheduled to be released during Q4 2017 for Microsoft Windows, Nintendo Switch, PlayStation 4 and Xbox One. The game will mark the return of the collaboration between both Classic Sonic and Modern Sonic since the twentieth anniversary game Sonic Generations. Despite initial popular belief, this title is not a sequel to any of the previous games.
The title was first mentioned at the Tokyo Joypolis Sonic 25th party on 25 June 2016. The game was announced at Sega’s 25th anniversary of the series at San Diego Comic-Con on 22 July 2016, where it was announced alongside Sonic Mania. The game will be developed by Sonic Team, the same team that had previously developed Sonic Colors and Sonic Generations, and will be headed by Sonic series veteran Takashi Iizuka. The presence of Classic and Modern Sonic lead some journalists to believe it was a sequel to Sonic Generations, but Iizuka confirmed that it was not a sequel, but a new, stand-alone title. The game will be released for Microsoft Windows, Nintendo Switch, PlayStation 4 and Xbox One in late 2017.