Ninja Gaiden Sigma till PlayStation 3. Ett actionfyllt spel som utmanar dina färdigheter.

In 2006, Tecmo and Sony announced the development of Ninja Gaiden Sigma for the PS3. Eidos obtained the European publishing rights for this game. Itagaki had no direct role in Sigma and judged it a flawed game, although he acknowledged that Sigma gave PlayStation owners a taste of Ninja Gaiden. A version for PlayStation Vita, titled Ninja Gaiden Sigma Plus, was released in North America and Europe on February 22, 2012.

The gameplay for Sigma is very similar to the original version, albeit with some modifications made to the game. Like the original version, the player's movements and combat system are directed using the console gamepad, which comprises the left thumbstick, two attack buttons, and a block button. The game features a large selection of weapons for Ryu to wield, each with advantages and disadvantages that affect the way the player approaches combat. A new addition to Ryu's arsenal is a pair of dual-wield swords, Dragon's Claw and Tiger's Fang. It also provides Ryu with magical spells in the form of ninpo, which allows him to inflict heavy damage on enemies while potentially avoiding damage himself. By shaking the Sixaxis controller, players can increase the power of their ninpo spells. Rachel, a non-playable character in the 2004 game, became playable in three new chapters, featuring the new bosses, Gamov and Alterator. Some of the design elements of the old levels were also changed, and several new enemy types were introduced.