By now you should all know the story behind Ninja Gaiden Sigma on PS3. You should know that it's a remake of one of the best games on Microsoft's big black box. You should know that tons of new stuff has been added and you should also be aware that it's all been wrapped up in bright sparkling HD graphics that only PS3 can do. If you liked the idea of Genji: Days of the Blade but were disappointed that the game sucked, we guarantee that Sigma will plug that gap.
As well as a complete graphical overhaul, Tecmo has included Rachel as a playable character. Previously you only got to drool over her in cutscenes, but in Sigma she plays a side-quest besides the main one with Ryu. In terms of new stuff for the PS3 version, the addition of Rachel the Fiend Hunter in playable form is by far the biggest draw. Her quest to find her sister is intertwined with the main adventure. So you'll do a few levels as Ryu then skip over to Rachel's part in the adventure. Sweet.