The Battlefield is a series of FPS video games that started with the Windows/Mac game Battlefield 1942 . The series is developed by the Swedish company DICE, and published by Electronic Arts. The games feature a greater focus on large maps, teamwork and vehicle warfare than traditional first-person shooters. The PC games in the series are mainly focused on online multiplayer. The Battlefield series has served more than 50 million players worldwide as of 2012,  across 25 games released since its inception in 2002. The series has a recognizable 6-beat sting.  
Battlefield 1942 was released on September 10, 2002, using the Refractor gaming engine, and introduced the “Conquest” gameplay mode, in which players fought for “capture points” throughout the map. Two expansion packs were released, The Road to Rome and Secret Weapons of WWII .
Battlefield Vietnam , released in 2004, moved the setting to the Vietnam War, and was built on a modified Refractor engine with various gameplay improvements, such as firing personal weapons while seated in vehicles.
The 2005 game Battlefield 2 takes place in the modern day, during a fictional war between the United States, China, and the fictional Middle Eastern Coalition (MEC). Despite it requiring numerous software patches due to the large number of bugs and glitches in the game upon its release, it was a commercial success, selling over 2,250,000 copies worldwide, as of July 2006.  It also received widespread critical acclaim, with an aggregate review score of 91%.  One expansion pack, Special Forces , and two booster packs, Armored Fury and Euro Force , were also released. A version of the game called Battlefield 2: Modern Combat was released for consoles, with an improved single player mode but more limited online play.