Call of Duty is a first-person shooter game developed by Infinity Ward. It is set in World War II and offers both single-player and multiplayer modes. The single-player campaign follows the path of three soldiers from different armies, with 26 missions to complete. In multiplayer mode, players can choose between four sides and four game modes. The game's maps are renditions of real battlefields, such as Sainte-Mere-Eglise, the shores of Normandy, Berlin, and Stalingrad.

The game's single-player campaign is focused on completing objectives in chronological order. There are four difficulty levels, and players can carry two main weapons, one pistol, and 10 grenades. The players can also melee any enemy they encounter in the game. The multiplayer mode offers four game modes: Deathmatch, Team Deathmatch, Domination, and Search and Destroy. The game's maps are designed based on real battlefields, which adds to the game's realism.