Sonic Mania is a new Sonic franchise game built entirely around the play mehanics of the early Megadrive/Genesis Sonic titles. It features sprite based side scrolling, and everything you'd expect from a retro-styled Sonic game. It'll be available for Switch/XBOne/PS4 August 15 2017, and for PC August 29 2017. http://www.sonicthehedgehog.com/en/game-info/sonicmania/ Coolest of all, it's being co-developed by Christian Whitehead. For those not familiar with his background, the Aussie game dev became famous for unofficially porting different Sonic games to mobile platforms as well as making his own enhanced versions and fan games. At first Sega took legal action to shut the projects down, but after some time changed their mind, and hired Whitehead to do the ports. Undoubtedly he's the exact person you want working on an official retro-style Sonic game, so this should be a great title.