The problem of Chicago, as far as I could tell (I’m not specialist) is related to drug gangs first and foremost.
Of course, the fatherless kids, the culture of entitlements, etc, don’t help. But in Chicago per se (in some very specific districts) there is permanent civil war among druglords.
My solution would be to legalize this drug (in order to offer another way of resolving conflicts than the gun: such as Courts of Justice).
That civil war extends into the City Hall. With bosses owning the government.
I'm not sure there is a fix. Chicago may go the way of Detroit.
But other cities don't have those problems like that.
Video games aren't the problem. Communist governments are.
If you believe the most violent city in America has its violence problem “first and foremost” because of drugs and you cannot even explain what the role of video games is, IF ANY, in that mess, why do you expect to ban a legal product?
Banning Halo 4 and legalizing crack should fix the murder capital of the USA up nicely.