Call of Duty is not replicable. Call of Duty is too entrenched for any rival, no matter how well equipped, to catch up. It has been the top-selling game for almost every year in the last decade and, in the first-person shooter (‘FPS’) genre, it is overwhelmingly the top-selling game. Other publishers do not have the resources or expertise to match its success. To give a concrete example, Electronic Arts — one of the largest third-party developers after Activision — has tried for many years to produce a rival to Call of Duty with its Battlefield series. Despite the similarities between Call of Duty and Battlefield — and despite EA’s track record in developing other successful AAA franchises (such as FIFA, Mass Effect, Need for Speed, and Star Wars: Battlefront)the Battlefield franchise cannot keep up. As of August 2021, more than 400 million Call of Duty games had been sold, while Battlefield had sold just 88.7 million copies.”