Original: Call of Duty 4: Modern Warfare (or Call of Duty: Modern Warfare) is a first-person shooter video game, developed by Infinity Ward and published by Activision for PC, Macintosh, PlayStation 3, Xbox 360 and Wii.
Simplified: Call of Duty 4: Modern Warfare is a first person shooter videogame released in 2007. It is part of the Call of Duty series.