About Final Fantasy Dissidia: Dissidia: Final Fantasy is an action fighting game by Square Enix for the PlayStation Portable as part of the campaign of the Final Fantasy series 20th anniversary. Information on the game was first released during the "Square Enix Party" event of May 2007. It is unknown if the game will be released outside of Japan, although the trademark Dissidia was registered by Square Enix in North America on April 6, 2007. The game features characters from different Final Fantasy games participating in one-on-one battles.