"Call of Duty," often referred to as "Call of Duty 1" or simply "COD," is the first installment in the Call of Duty series. Developed by Infinity Ward and published by Activision, it was released on October 29, 2003. The game is notable for its World War II setting and its focus on the infantry and combined arms warfare of the time.

Release and Platforms
Release Date: October 29, 2003
Platforms: Microsoft Windows (original release), later ported to Mac OS X, N-Gage, and PlayStation Network (PS3).
Setting and Story
Time Period: The game is set during World War II, specifically focusing on events from 1942 to 1945.
Plot: "Call of Duty" features three interwoven campaigns, each from the perspective of different Allied forces:
American Campaign: Players take on the role of Private Martin, a paratrooper in the 101st Airborne Division, participating in missions such as the D-Day invasion and the capture of Carentan.
British Campaign: Players assume the role of Sergeant Jack Evans of the 6th Airborne Division, engaging in missions like the Pegasus Bridge assault and sabotage operations in Norway.
Soviet Campaign: Players control Private Alexei Ivanovich Voronin, a soldier in the Red Army, fighting in the Battle of Stalingrad and the final assault on Berlin.
Gameplay
First-Person Shooter: The game is a first-person shooter with a strong emphasis on squad-based tactics and teamwork.
Linear Missions: The missions are linear but are designed to provide a sense of large-scale warfare with numerous scripted events and set pieces.
Health System: Unlike many later games in the series, "Call of Duty" features a traditional health bar system rather than regenerating health.
Innovations and Features
Squad-Based Gameplay: One of the key features of "Call of Duty" is its focus on squad-based combat, where AI-controlled teammates provide support and engage the enemy alongside the player.
Authenticity: The game aimed for a high level of authenticity in its portrayal of World War II combat, using realistic weapons, uniforms, and locations.
AI and Scripted Events: The AI was designed to behave more realistically, taking cover and using suppressive fire. The game also used scripted events to create a cinematic experience.
Reception
Critical Acclaim: "Call of Duty" received widespread acclaim from critics for its immersive gameplay, realistic depiction of World War II, and high production values. It was praised for its sound design, graphics, and engaging campaign.
Awards: The game won several awards, including "Game of the Year" from various gaming publications and organizations.
Commercial Success: "Call of Duty" was a commercial success, selling over 4.5 million copies by 2013.
Legacy
"Call of Duty" is credited with setting a new standard for World War II shooters and first-person shooters in general. It established the foundation for one of the most successful video game franchises in history. The game's success led to numerous sequels and spin-offs, expanding the series into various historical and futuristic settings while maintaining its core gameplay mechanics.

Overall, "Call of Duty" (2003) is remembered as a groundbreaking game that not only revitalized interest in World War II shooters but also introduced innovative gameplay elements that would influence the genre for years to come.

"Call of Duty," often referred to as "Call of Duty 1" or simply "COD," is the first installment in the Call of Duty series. Developed by Infinity Ward and published by Activision, it was released on October 29, 2003. The game is notable for its World War II setting and its focus on the infantry and combined arms warfare of the time. Release and Platforms Release Date: October 29, 2003 Platforms: Microsoft Windows (original release), later ported to Mac OS X, N-Gage, and PlayStation Network (PS3). Setting and Story Time Period: The game is set during World War II, specifically focusing on events from 1942 to 1945. Plot: "Call of Duty" features three interwoven campaigns, each from the perspective of different Allied forces: American Campaign: Players take on the role of Private Martin, a paratrooper in the 101st Airborne Division, participating in missions such as the D-Day invasion and the capture of Carentan. British Campaign: Players assume the role of Sergeant Jack Evans of the 6th Airborne Division, engaging in missions like the Pegasus Bridge assault and sabotage operations in Norway. Soviet Campaign: Players control Private Alexei Ivanovich Voronin, a soldier in the Red Army, fighting in the Battle of Stalingrad and the final assault on Berlin. Gameplay First-Person Shooter: The game is a first-person shooter with a strong emphasis on squad-based tactics and teamwork. Linear Missions: The missions are linear but are designed to provide a sense of large-scale warfare with numerous scripted events and set pieces. Health System: Unlike many later games in the series, "Call of Duty" features a traditional health bar system rather than regenerating health. Innovations and Features Squad-Based Gameplay: One of the key features of "Call of Duty" is its focus on squad-based combat, where AI-controlled teammates provide support and engage the enemy alongside the player. Authenticity: The game aimed for a high level of authenticity in its portrayal of World War II combat, using realistic weapons, uniforms, and locations. AI and Scripted Events: The AI was designed to behave more realistically, taking cover and using suppressive fire. The game also used scripted events to create a cinematic experience. Reception Critical Acclaim: "Call of Duty" received widespread acclaim from critics for its immersive gameplay, realistic depiction of World War II, and high production values. It was praised for its sound design, graphics, and engaging campaign. Awards: The game won several awards, including "Game of the Year" from various gaming publications and organizations. Commercial Success: "Call of Duty" was a commercial success, selling over 4.5 million copies by 2013. Legacy "Call of Duty" is credited with setting a new standard for World War II shooters and first-person shooters in general. It established the foundation for one of the most successful video game franchises in history. The game's success led to numerous sequels and spin-offs, expanding the series into various historical and futuristic settings while maintaining its core gameplay mechanics. Overall, "Call of Duty" (2003) is remembered as a groundbreaking game that not only revitalized interest in World War II shooters but also introduced innovative gameplay elements that would influence the genre for years to come.