I dont know the specifics on this case but good chance that steve is right. In video games we dont have anything beyond the MA15+ rating, which requires that to purchase a game you have to be over 15, or purchase it with adult supervision if your under 15.
The same system is used for Movies and the like, for movies the next classification up is R18+ which means people under 18 cant rent, buy the object and X18+ which are things with significant sexual content.
Literally every politician except 1 wants the R18 added to video game classification, but the 1 is able to stop it
Dosent stop online sales and the like though.