By Spencer . August 3, 2007 . 5:25am
Tecmo announced the first expansion pack for Ninja Gaiden Sigma is a survival mode where you try to kill as many enemies as you can with limited health. The bonus content is not free; Tecmo has it priced for 315 yen ($3) in Japan. In September the second expansion pack comes out, which adds in a time attack and in October players will be able to try out the survival mode with Rachel and her new costume. The price for the other two expansion packs has not been announced, but they are likely to be sold at a similar price.