With the different developers in the COD franchise, how many people like the change of the storyline between games? Yes, IW has the MW title, which seems to chronicle a plot, yet COD in general changes between developers. Treyarch seems to adhere to earlier periods. What I'm wondering is, why can't we have a continued storyline between the 2 companies. Mass Effect, Halo, and Gears of War follow a storyline, yet COD seems to bounce between generations. I know COD has the Multiplayer experience that keeps people playing, but I'm wondering what separates the single player campaign.