"Call of Duty: WWII" is a video game that is based on real historical events and settings, but it is not entirely realistic. While the game aims to depict the World War II era with historical accuracy, it takes creative liberties for the sake of gameplay and storytelling.
Modern Warfare is a sub-series of the Call of Duty franchise from Activision. Modern Warfare was created by Infinity Ward, and currently consists of six games: Call of Duty 4: Modern Warfare. Call of Duty: Modern Warfare 2.