PSXE writes: Although Tecmo still refuses to initially bring new Ninja Gaiden installments to the PlayStation 3, it seems that fans of Sony's machine only have to wait a bit longer to receive an updated and overall superior version. It happened with Ninja Gaiden Sigma, and after Ninja Gaiden II launched on the Xbox 360 last year, Tecmo is doing it again with Ninja Gaiden Sigma 2, set for release on the PS3 later this year. If you're not familiar, this is actually a prequel to the early NG titles on the NES, and you will once again step into the fleet and competent shoes of Ryu Hayabusa, who seeks to restore order to a world infested with bad guys and demons. Sigma 2 will further boast plenty of additions and enhancements based in part on fan feedback taken from the 360 version, and this includes new playable characters and what Tecmo is calling "30% more content" for the single-player campaign alone. We're specifying because another new option will be the online co-op mode, which is destined to appeal to many hardcore action aficionados out there.