The long awaited Ninja Gaiden 3 launched in North America today and with it early adopters got the highly anticipated Dead or Alive 5 demo. The demo will serve another purpose to developer Team Ninja, in addition to guaranteeing that tons of gamers ran out and pre-ordered the game. They’ll also be utilizing fan feedback from it, via a neat little website. Anyone who plays the demo has from now until April 30th to leave a review of their experience with it.

The site asks about your experience with the DOA series, which version of the demo you had (there’s the GameStop pre-order girls demo, the Amazon pre-order guys demo and the collector’s edition premium demo with all four fighters) and your opinion on a number of elements including the level, character, and stage design, controls and balance. Hopefully the team puts the feedback to good use. Dead or Alive 5 is due on PS3 and Xbox 360 this September.