2004 · Role-playing (RPG) · Turn-based strategy (TBS) · PlayStation · PlayStation 3 · PlayStation Portable
Black/Matrix OO ("Double O") is an expansion of Black/Matrix Zero featuring a heavily reworked and expanded story, numerous additional endings, New Game+ options, and several new mini-games. Basic gameplay and graphics are unchanged from the original Game Boy Advance release. It is the last game to be released on the PS1 in Japan.