If this isn't enough, try out DoA too

Hack-and-slash Ninja Gaiden III is bringing a little gift when it launches in Japan on 22nd March.

Early purchasers will get an exclusive Dead or Alive 5 demo featuring Ayane and Hayate, but anyone who picks up the game's collector's edition will also get Hayabusa and Hitomi in their demo, as well as a figurine and other good stuff.

No news on whether this promotion will leave Japan but we'll keep you posted.

[source andriasang.com]