2013 AD: A radio transmission is intercepted from an unknown extraterrestrial source 2014 AD: Attempts are made to establish contact with the source, but to no avail. 2015 AD: A technologically advanced international army, the EDF, is established. 2017 AD: A large fleet of alien spaceships, dubbed the Ravagers, arrives on Earth and begins indiscriminately attacking humans... "Earth Defense Force" is a shooting action game and follow-up to "THE Earth Defense Force" and "THE Earth Defense Force 2", released in Japan. In this game, the player becomes a soldier of an international army, the EDF, trying to defeat an alien army that suddenly arrives on Earth. The PS2 predecessors have sold over 350,000 copies in Japan, and now the popular series has made its way to the XBOX 360. To take advantage of the console's high definition capability, the graphics and gameplay have been improved, while the design and game world have been completely revamped.