Ninja Gaiden Sigma is a more "complete version" of the Xbox Team Ninja title, with new moves, actions, and weapons for Hayabusa.

TGS 2006: Eyes-on Ninja Gaiden's Teaser - September 23, 2006
Blistering masked action slices its way through the PS3.

TGS 2006: Ninja Gaiden Sigma Interview - September 28, 2006
How can one of the best action games ever get better?

Ninja Gaiden and PS3 -- An Editorial - July 25, 2005
Tecmo announces five new games at Xbox 360 summit, but Ninja Gaiden 2 isn't one of them. Could this mean something more?

Confirmed: Ninja Gaiden on PS3 - September 20, 2006
Team Ninja remakes one of the best action games ever.

E3 2005: Ninja Gaiden 2 Not for 360? - May 20, 2005
Team Ninja does not confirm the sequel for Xbox 360. Could it be headed to the PS3?

Team Ninja Developing for PS3? - December 1, 2004
Apparently we'll know soon.