アーマード・コアシリーズ
While system link and split-screen options return, "Armored Core 4" is the first entry outside of Japan to have online multiplayer, since the mode's sole implementation in the Japanese version of "". Players on the PlayStation Network or Xbox Live can play with up to 7 additional players in various deathmatch modes. On the Xbox 360, "Armored Core 4" introduced achievements to the franchise.