@anongos: There are some kind of rating boards in other countries like Japan, but ours are run by government and enforced by law and full of stupid moralists and famous for being extremely slow. Oh, and it applies to every games in Korea including PC games, consol games, arcade games, flash games, fan made games, indie games etc. Even if you are a 10 years old kid and made an extremely simple game for your friends, that should be previewed. Of course, those 'previewing' costs a lot. And this is the reason that we don't have 'game' category in Apple's appstore.