The Call of Duty franchise is a popular series of first-person shooter video games, first released in 2003. Developed by various studios, including Infinity Ward and Treyarch, the games are known for their immersive gameplay, engaging storylines, and realistic graphics. The series often focuses on military conflicts, featuring both historical and modern warfare settings. Over the years, Call of Duty has expanded to include multiple titles, spin-offs, and mobile games. The franchise has a large online multiplayer community, allowing players to compete against each other in various game modes. Its success has made it one of the best-selling video game franchises of all time.