This game is seemingly morbid, disturbing, and violent.
In the first hero stage, Sonic proceeds to cause hundreds of cars to crash and fly into the air. Some of them have people in them. These people are being murdered by sonic. Not to mention the buildings the cars fly into. Sonic is obviously destroying homes and residents on top of all of this. Then, the military truck comes in, causing hundreds of times more wreckage than Sonic. Does the military really care for it's people? Why so reckless just to capture one villain?
Then there's the military base. Robotnik blows it up. It's a military base, there's bound to be a bunch of people in it. And not only does he blow up the base, but the entire island. This includes all the plantation and wildlife. I'm shocked PETA wasn't all over this game.
Then Shadow forces a giant defenseless lizard to mount a giant cannon in it's own ass just to find it's way to Earth. The poor thing has a giant life support system on it. It can't even live without a machine helping it, then they go and attack it's 'weak spots'.