Along with the teaser trailer for Project Sonic, a new title in the series was announced at San Diego Comic-con during SEGA's Sonic the Hedgehog 25th Anniversary Party.
Titled Sonic Mania, the game features 2D pixel-style art and classic platforming gameplay. It contained re-imagined Zones and Acts from Sonic The Hedgehog, Sonic The Hedgehog 2, Sonic CD, Sonic The Hedgehog 3 and Knuckles along with new Zones with all-new Acts and bosses.
The game will be available for digital release in spring 2017 for PC, PlayStation 4 and Xbox One.
It was also announced at the anniversary event that mobile game Sonic Dash has been downloaded over 200 million times.
To celebrate, the developers are releasing a special in-game level event that includes the Green Hill Zone and classic-Sonic as a playable character. The event will last one week and once unlocked, the zone and classic-Sonic will be playable even after the event.
Screenshots for Sonic Mania are posted below.