https://www.gamespot.com/articles/call-of-duty-ww2-fails-to-earn-its-campaigns-setti/1100-6454861/

In 2003, former Medal of Honor developers released their first game as a new studio. Although it began development under the codename "MOH Killer," it would soon be known as Call of Duty.

Flash forward 14 years, and the Call of Duty franchise has become a video game juggernaut, selling over 250 million units in sales, from three separate studios, over the course of its lifetime. It's gone from World War II, to the Cold War, to the future, and back again.