It's been a long time since Sonic has had a console game that wasn't bogged down by experiments gone awry, usually withholding polish on what should have been core gameplay.
The Sonic fan-base has debated the exact point at which this downhill spiral began – whether it’s the over-fifteen years since Sonic 3 and Sonic & Knuckles, or the ten since Sonic Adventure 2. However, both classic and modern Sonic fans tended to agree that the games were not improving.
Sonic Colors could be seen as the comeback for those who played it, but I was not one who did. A Sonic fan in my youth, after Unleashed I was done. After playing the last werehog level just to get to the next Sonic one and spending fifteen minutes on clunky platforming – the longest level I ever played in the franchise – I’d had enough. I don’t get paid to put myself through such torture; I certainly shouldn’t have to pay for it with time or money.
So why did I play Generations? Valve offered me a free copy of Sonic 3 and Knuckles (and Sonic 3D Blast, lest we think the ’90s had no bad console games) if I pre-ordered it for $30.
Replaying the levels of the "free" old games, I wondered pessimistically whether these gifts would symbolize the game itself: a solid, flowing platformer (Sonic 3 and Knuckles) with injections of clunky, awkward and nearly game-killing 3D elements (Sonic 3D Blast).
Thankfully, this was not the case.
As Pittsburgh convention 
It's been a long time since Sonic has had a console game that wasn't bogged down by experiments gone awry, usually withholding polish on what should have been core gameplay.