Call of Duty 4: Modern Warfare, released in 2007, marked a significant shift in the popular first-person shooter franchise. Developed by Infinity Ward and published by Activision, the game brought a new level of realism and modern-day combat to the series, diverging from its historical roots. The game's campaign, coupled with its innovative multiplayer mode, set a new standard for the genre and solidified the Modern Warfare series as a cornerstone of the Call of Duty franchise.