This is the game that until mid-March was called Project Sonic 2017. Much like 2011's Sonic Generations, this brand new game from Sonic Team will see both "Classic Sonic" and "Modern Sonic" teaming up in a non-linear adventure with multiple paths through every level. There'll be lots and lots of running really fast. And collecting rings. And jumping on robots. The studio says it will be running on "Hedgehog Engine 2" (the first was seen powering Sonic Generations) and that the Wisp power-ups from Sonic Colors will be featured again.