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.