Ken McKown writes: Every year Activision unleashes a shooter with the Call of Duty moniker attached, and every year we write the same stories about how it sold more than anything else to date. We also see plenty of discussion about how the series never changes. Well, with Black Ops 2, Treyarch is aiming to change that mentality. This year, when gamers talk about Call of Duty, you will likely hear the same discussion about its multiplayer domination, but you will also hear plenty of people talking about how different, and interesting the campaign is. Black Ops 2 is a step in the right direction for a franchise that feels the same year-in and year-out.