The most intense, challenging, action-packed ninja adventure is back, exclusively on PS3! From Tokyo to New York, follow super ninja Ryu as he encounters vicious enemies and aquires an extensive assortment of ninja weaponry along the way. New Playable Characters: Ninja Gaiden's Rachel, Ayane from the Dead Or Alive series and Momiji from Ninja Gaiden: Dragon Sword appear as sexy new playable characters. Online Co-Op: Two people can engage in online co-op play, with voice chat, in 30 or more different stages (in 4 different difficult settings) to complete special missions. Rankings from each mission are recorded and posted online, where gamers can choose their opponents based on players' mission stats. Visual Diversity: Over 30 unique characters, 17 stages with a variety of environments and a story which unfolds in 70 impressive cut-scenes. New Enemies: A variety of new enemies and bosses have been incorporated into the stunning enhanced environments. Variable AI: Contributing to the increased difficulty level, the gameplay differs each time you appear in a level as enemies engage in a variety of different actions as they assess the current situation. Gameplay Innovation: A finishing blow can be used in battle to quickly defeat an enemy in one dynamic action.