Gabe Newell may be going to Australia, but his latest game, Left 4 Dead 2, is not. The Australian government has refused classification to the upcoming zombie shooter's "realistic, frenetic and unrelenting violence." Because the Australian ratings system doesn't offer an 18+ rating for games, Left 4 Dead 2 joins the growing list of games banned by the government.While Valve is unlikely to look upon this decision favorably, it can turn this ban into a marketing bullet point. The first game received a MA15 rating, meaning Left 4 Dead 2 must have a totally noticeable and sequel-worthy increase in violence. Doesn't that warrant another $60 purchase (for those of you outside Australia)?[Thanks, Jake and Dai!]