1. Call of Duty (2003) The franchise's first game was developed by Infinity Ward and published in 2003. This is the first of many entries in the series focused on World War II, following the steps of other household names like Medal of Honor.

29, 2003, an ambitious video game made by a team of 27 people that aimed to mimic the feeling of boots-on-the-ground infantry action. Today, more than 3,000 people work on Call of Duty, a franchise with eye-popping earning power; last year's Modern Warfare II  pulled in more thanR$1 billion in revenue in 10 days.

In Modern Warfare 2, Modern Warfare 3 and Black Ops II, they only allow the player to unlock achievements/trophies, though one of the Challenges for every mission in the latter game, allowing for unlocking of extra equipment, requires the player to acquire all three Intel items in the level.

Modern Warfare III retains the realistic, modern setting of its predecessors and continues the sub-series storyline. The story follows multi-national special operations unit Task Force 141 tracking down Vladimir Makarov, a Russian ultranationalist and terrorist planning to trigger a third World War.