After more than a month of absence, Call of Duty : WWII has officially reappeared in the Microsoft Store and PC Game Pass. Why the Game DisappearedIn late June, WWII launched on Game Pass. In simple terms, this allowed hackers to run programs on another player’s PC without permission. Because of the risk, Activision and Microsoft pulled the game’s Windows version from the Microsoft Store. The pause also shows the challenge of bringing older Call of Duty titles to the Microsoft Store.