Call Of Duty is one of the biggest franchises in gaming and has gone through major changes over the years. The series started as a World War 2 shooter but recently was brought into the modern era. The series has had two developers Infinity Ward and Treyarch. Infinity Ward was responsible for the Modern Warfare games which are the highest selling games of all time. Treyarch responsible for World At War has developed Black Ops aiming to bring a game to the masses which can live up to the series’ name.