According to Kotaku, "While the Australian government dawdles on changes to the country's classification guidelines, games continue to be "refused classification" on the grounds they exceed the maximum rating of MA15+. The latest game on the chopping block? Left 4 Dead 2.
Yup, Valve's Zombie shooter has been refused classification, which means it can't be made commercially available in the country. Not quite the same as a banning, but it has the same effect."
C'mon Aussie Govt, C'mon. We need an R rating for Video Games. Though I have to wonder if this will affect digital downloads as well, otherwise Steam FTW.