The latest version of Grand Theft Auto could be on its way to becoming the biggest launch in entertainment history, with pundits expecting it to sell 6-million copies in its first week. 

This would put it up there with the debut of Pirates of the Caribbean III, currently the record-holder, and ahead of both Spiderman 3 and Halo 3, which notched up $300-million in its first week.
Meanwhile the hero of the game, Niko Bellic, is rapidly turning into a global cult figure.
In Grand Theft Auto IV, players "become" the character and immerse themselves in the virtual world where they can interact with other characters.