Operation Metro was the first map ever showcased for Battlefield 3, and was the map used in the Alpha and Beta testing of the game. The map is set in Paris, France, where Russian forces have taken control of a portion of the city and the US Marines attack in the Rush mode. The map also supports Conquest, Conquest 64, Squad Rush and Team Deathmatch.
Operation Metro Unique features
The map is divided into three main sections: An outside area centered around a park, a large, underground metro area, and another open, Urban environment. The map offers a lot of tense combat and tight sections, particularly in the Subway section.
Operation Metro video