Ninja Gaiden Sigma 2 (PS3) New Playable Characters - Ninja Gaiden's Rachel, Ayane from Dead or Alive 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 10 different stages (in 4 difficulty settings) to complete special missions. Visual Diversity - Over 30 unique characters, 17 stages with a variety of environments, and a storyline 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