Ninja Gaiden Demo Bonus | PS3Blog.net
When you get the final version of the game. It will see how much of the demo you’ve played and reward you with some Yellow Essence, basically your in-game cash. You can use that at the start of the game to buy items, power-up your weapons. What a great idea! Some people spend a lot of time on demos. Now you will finally get rewarded for playing the demo. Hopefully future demos will have this feature.