The Sunburnt Country has never been a very friendly place for video games with adult content. With a maximum game rating of MA15+, games which are deemed unsuitable for the pubescent, corruptible senses of a 15-year-old are often refused classification, and therefore banned. Several North American best-sellers have fallen victim to Australian banning, or been forced to release censored versions for the land down under, such as GTA III, Postal, Manhunt, and (preemptive attack!) Dark Sector.
Luckily for gaming Aussies (50 percent of which are over the age of 18), government officials are considering the addition of an R18+ rating, allowing the sale of more mature titles. This proposition will be discussed at the next Standing Committee of Attorneys-General on March 28. Should the system undergo the change, for the first time in Australian video games, there will be blood, nudity, and strong language. You know, the good stuff.