NEW YORK: These days, guns are more popular than guitars, at least when it comes to video games. The company behind “Guitar Hero” said Wednesday that it is pulling the plug on one of the most influential video game titles of the new century. Activision Blizzard Inc., which also produces the “Call of Duty” series, is ending the “Guitar Hero” franchise after a run of more than five years. “Guitar Hero” was iconic and often praised for getting a generation weaned on video games into music.