The player takes control of one of twelve characters, each with their own back story that links with the devastating war and the reappearance of a powerful threat. Each has their own skill and weapons to use, however unlike traditional fighting games with life bars, the life bars are still present, but they are determined through hit points.
The game is shown through 2-D cel-shaded graphics on 3-D environments while the story is told through hand-drawn illustrations by Emiko Iwasaki, who also drew the main characters in the game. The game was released on March 6, 2009.