Grand Theft Auto IV was released worldwide for Playstation 3, Xbox 360, and PC in April 2008. The target audience is perceived to be those over 18 due to its violent and graphic content, however many under 18 players also enjoy the game. Key features include playing as the main character Niko Bellic to complete missions around the open world city of Liberty City using various vehicles and weapons while avoiding police. The game has sold over 17 million copies as of 2010 and had two episodic expansions released.