So whose research to believe? The U.S. Supreme Court has already ruled. In striking down California's attempt at a violent video game law, the court had this to say about studies linking games to violent behavior: "These studies have been rejected by every court to consider them and with good reason. They do not prove that violent video games cause minors to act aggressively."
While "Halo 4" is far tamer than the violent games many have pointed fingers at, Ross' advice is the same to parents who worry about their children playing it.
"We are rated 'M,' and I think that means 17-plus," she said. "What I recommend is -- your kids are going to play games, play it with them so that you can really be there to answer questions and help them through that. And you really have to make a decision, as a parent, what's right for you."