Will of Heroism is a story where you, the player, or should I say, the Hero will be in a country where most criminals are never caught, justice is but a myth here, until a group of friends have the courage and the means to change it, even if it is just little by little.
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