June 4, 2007 - As further proof of their infinite rockingness, Team Ninja and Tecmo have announced a way to extend the life of the Ninja Gaiden Sigma demo that's now available for download via the PlayStation Store.
The final version of the game will be able to detect how much of the demo you've played, and will reward you with an appropriate amount of Yellow Essence. This in-game form of currency can be used to purchase items and power-up your weapons, possibly making your first play-through of the full game a bit easier. Given the difficulty level we've come to expect from a Team Ninja title, this sounds like a good deal.
Those who want to get a head start on their fellow players prior to Sigma's release in a few weeks should start by downloading the free demo.