Use the art of Sou-Setsu-Ken to rescue the kidnapped Marian! Plus, new enemy characters including ninjas, karate masters, and sumo wrestlers, none of which have been seen in Double Dragon before! There are lots of extra modes, too! Cool new features fans have been waiting for! Playable enemy characters, Tower Mode, and even more! [Supported OS] iOS version: 8.0.2 or later ※This game is tested on most devices with the settings above. [Official Website] http://www.arcsystemworks.jp/dd4/ [Contact Us] Game Support http://www.arcsystemworks.jp/support/form.php [Arc System Works official Website] http://www.arcsystemworks.jp/