Team Ninja fans will immediately recognize the two playable additions noted in a Gamespot preview: Dead or Alive's purple-haired ninja, Ayane, and Ninja Gaiden Dragon Sword's female warrior, Momiji. Each character's tale will be woven into the existing Ninja Gaiden 2 story and branch off at certain points. That's all well and good but the freshly announced online co-op is what has our interest piqued. Unfortunately, the co-op skips the main campaign and offers 30 challenge areas that are playable on four difficulty settings (presumably, Ninja Dog to ZOMGWTHBBQ!). Still, it's a surprising (and welcome) addition to what could have ostensibly been considered a simple re-release.
And for those who prefer the simpler additions, Tecmo says they're in there too. New enemies, weapons, and tweaks to the camera and gameplay are all included. Ninja Gaiden Sigma 2 is set to land on the PlayStation 3 this fall -- the trailer is embedded after the break.