I would buy a few things....:
A high-powered sniper rifle firing untraceable rounds (preferably developed by monks somewhere in Asia).
A crossbow.
A set of brass knuckles.
A Guy Fawkes mask.
A pair of leather gloves.
Several cans of spray paint.
A powerful television broadcast interrupt.
....and call in a few favors:
I'd get as much exposure as I could through several channels (major news outlets, interrupted broadcasts of reality shows and Fox "News"), both as myself and as my alter-ego (wearing the above Guy Fawkes mask, a suit and the leather gloves). As my alter-ego, I would be sure to have no traceable or identifying marks showing.
My alter-ego would be impassioned, irate, clearly aggrieved by the loss of his favorite pasttime, while I would advance the cold, emotionless, rational reasons why banning video games is a bad idea. Both individuals would reference the other, and I'd be sure to disagree with myself often enough to alleviate any suspicions.
As a final act (if all else failed), the man in the Guy Fawkes mask would assassinate the public figure who had caused all this trouble. I would publicly shun his actions as foolhardy and ill-thought, while simultaneously acceding that his intention was correct. I would point out that he represents a strong portion of the population who disagreed with the figure's position on gaming, and hint that, perhaps, he's not the only one with access to powerful rifles and the skills to use them. On the strength of this, I would attempt to regain control of the government and obliterate that law.
As much as I hate to prey on other people's fears of chaos, occasionally there is no choice. Sometimes you have to do wrongs to do rights. Usually, that fails horribly, but sometimes it's necessary.