If games were banned, I'd start a huge movement and get a petition going, crying they are impinging on my First Amendment right (obviously I'm in the states) and use further support from a renowned legal mind: Judge Richard A. Posner.
This is his discussion on"The House of the Dead":
"The player is armed with a gun-most fortunately, because he is being assailed by a seemingly unending succession of hideous axe-wielding zombies, the living dead conjured back to life by voodoo. The zombies have already knocked down and wounded several people, who are pleading pitiably for help; and one of the player's duties is to protect those unfortunates from renewed assaults by the zombies."
In sum from: http://www.freedomforum.org/templates/document.asp?documentID=15202
* Video games enjoy some measure of protection as free speech because they contain real messages, ideology and expression.
* The city has a significant burden if it wants to limit access to video games. It has to show an overriding public interest, based on more than just a hunch that violent games may harm kids.
* Kids have constitutional rights. Free speech is not something that is awarded with a high school diploma. In the court's words, "Now that 18-year-olds have the right to vote, it is obvious that they must be allowed the freedom to form their political views on the basis of uncensored speech before they turn 18, so that their minds are not a blank when they first exercise the franchise ? people are unlikely to become well-functioning, independent-minded adults and responsible citizens if they are raised in an intellectual bubble."
With the beautiful conclusion: "Young people have significant rights of free expression and their entertainment often enjoys constitutional protection."