The title speaks for itself. Silent Hill Homecoming (aka Silent Hill 5) has been refused classification by Australia's Classification Board, which has the effect under state and territory law of banning it. Which is to say that it would likely have fit into an R18+ classification if one existed, but it's been shafted by the lack of such a classification for videogames.
Canberra residents who are outraged by videogame censorship are strongly encouraged to vote for me in the ungrouped column at the October 18 ACT election.
For those elsewhere in Australia, the path is to get the attention of your state Attorney-General, preferably in person or by phone, but in the alternative by snail-mail or polite, literate email.