Like its forebearer, Ninja Gaiden Sigma 2 isn't a simple PlayStation 3 port of the last Xbox 360 installment in Tecmo's shinobi action series. Besides all the content of Ninja Gaiden 2, the game will sport femme fatales imported from Tecmo's Dead or Alive and an upgraded graphics engine.
Now, though, GameStop is giving further incentive to pick up the title by exclusively offering a $70 Ninja Gaiden Sigma 2 Collector's Edition. According to the retailer's product page, the special version will include an 80-page book with three parts: a strategy guide, a section with "vibrant Ninja Gaiden art," and a comic book that corresponds to in-game cutscenes and the storyline.
All editions of Ninja Gaiden Sigma 2 feature a new online co-op mode with more than 30 challenge stages. The M for Mature game launches in North America on September 29 and is explained in detail in GameSpot's video interview below.