We had a chance to sit down with Flagship Studios' Bill Roper for an in-depth look at Hellgate: London, a new 3D hack-and-slash game that will pose the question: what if the city of London, England, were to be invaded by demons in the not-too-distant future? As Roper explained, this unusual idea came from a number of different sources, such as the studio's research into secret societies like the Knights Templar and the Freemasons (who, incidentally, were responsible for much of the construction of the London underground subway system, known colloquially as "the Tube").