Recently, there has been a rise in teenage violence and crime, and the public is not happy about it. Massive protests have ensued; urging the government to do something because it seems like these violent and uncontrollable youths can just do whatever they want with little to no consequences for their actions.
In order for you to be able to install this game, you need to enable (allow) installation of applications from unknown sources (Unknown sources) in the phone settings. Usually this item is in the Security section