Australia’s video game classification system has always been a bit of a joke, but recent news only further proves this. Case in point: the Australian Classification Board has refused classification for the upcoming physical copy of DayZ. However, the digital copy remains legally available.

While the news wasn’t a huge shock, many are wondering: how did something so big slip through?

For one, the Australian Classification Board knocked back the disc-based version, set for local distribution by Five Star Games. Many presumed it was on the grounds that it featured morphine. However, many other games in Australia fall under the same category, but don’t suffer the same fate.

However, a more popular theory is that the game was likely to “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”.

On the other hand, the digital version of the game, having been available on Steam for six years, remains available. While having only been completed recently, it was still submitted and cleared under an international classification arrangement – one that is less conservative than the Australian Classification Board.

DayZ remains up on Steam, as part of the Bohemia Interactive Humble Bundle, the PlayStation Store, and Xbox Live.