We all know that Australia is a bit of an arse when it comes to classifying games and actually getting them into stores sometimes, and unfortunately, Hotline Miami 2: Wrong Number has fallen foul of that.
The game falls outside of the R18+ rating and the Classification Board has stated that the reasoning for this is due to a sequence in which the protagonist character appears to rape a female character.
The computer game is classified RC in accordance with the National Classification Code, Computer Games Table, 1. (a) as computer games that "depict, express or otherwise deal with matters of sex, drug misuse or addiction, crime, cruelty, violence or revolting or abhorrent phenomena in such a way that they offend against the standards of morality, decency and propriety generally accepted by reasonable adults to the extent that they should not be classified."
There are various reports that the game is "one of the most violent" so it is no surprise that Australia have taken the decision to ban the game, meaning that it can't be legally sold or distributed in the country.