アーマード・コアシリーズ
"" was released on April 12, 2001 as a stand-alone expansion. It allowed players to import their save files from "Armored Core 2" and continue with their existing Armored Core units. The game introduced movement controls using the DualShock analog sticks and cooperative mission mode. The Japanese version of "Armored Core 2" was the first title to include online broadband play, allowing players to fight each other over the internet.