Activision has been on an annual release schedule for its Call of Duty games since Call of Duty 2 in 2005. Like clockwork, fans of the franchise have been able to rely on a new Call of Duty title every year.
Activision has been able to keep this schedule as each is game rotates between developers Treyarch Studios, Infinity Ward, or Sledgehammer Games, with each developer allotted three years to develop their Call of Duty game. This rotating developer system has enabled Activision to keep players
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