A Grand Theft Auto clone belongs to a subgenre of open world action-adventure video games, characterized by their likeness to the Grand Theft Auto series in either gameplay or overall design. In these types of open world games, players may find and use a variety of vehicles and weapons while roaming freely in an open world setting. The objective of Grand Theft Auto clones is to complete a sequence of core missions involving driving and shooting, but often side-missions and minigames are added to improve replay value. The storylines of games in this subgenre typically have strong themes of crime, violence and other controversial elements such as drugs and sexually explicit content.