Violent Video Games = Free Speech?

A judge in Lousisiana has blocked a state law that bans the sales of violent video games to minors claiming that the law violates free speech rights? Four other states have had similar laws blocked on the same constitutional grounds. I don't understand this. So a video game is speech? What about movies? Can the government prevent minors from seeing or buying movies just because they are violent. Several months ago, my wife and I, who are both in our thirties, had our IDs checked before we went to the R-rated movie A History of Violence. There were no sexual themes in this movie. It was simply very violent. Why did the theater need to verify our ages. If we had been minors, wouldn't the free speech rights of the movie company have been violated if they couldn't get their message across to minors? What about Playboy magazine. Why isn't prohibiting their sale to minors also a violation of the First Amendment? I guess it will be completely up to parents to monitor what video games their children play, not that I think they shouldn't be, but keeping minors from buying some video games would make things a little easier for parents.