Warriors Orochi = Dynasty Warriors + Samurai Warriors

Warriors Orochi is one of the action games created by Koei, where the heroes from Dynasty Warriors and Samurai Warriors are brought together in one game. Maybe most of you have already known those two games. They were so famous that most of the gamers have played them. The gameplay of Warriors Orochi is still the same, where you control an ancient hero from China or Japan to wipe out all of the enemies. I don't know why, but this kind of gameplay is getting popular since Koei released Dynasty Warriors 3. About the story, I think it is far distorted from the original one, as this is a crossover game. The story is about the Serpent King Orochi who wants to conquer the entire land where the heroes are met by time and space distortion. So the heroes must work together in order to get to their original world by defeating Orochi.
It is a bit funny to find the heroes from two different countries argue in English. There are some awkward moments when two heroes whose face are alike meet and make fun of each other. In a stage near the end of the game, leaders of the three kingdoms: Wu, Wei, and Shu work together to fight the Serpent King Orochi. Some people might think,"Cool!"; While the others think,"What the heck is this?" Most of game reviewers think that this game's purpose is just for fan service.
In my opinion this game is worth to be bought. It has a lot of new features which we haven't experienced in the previous Warriors series games. Although the story is a bit strange and the heroes are out of character, the gameplay can cover it up.

Source:
http://en.wikipedia.org/wiki/Warriors_Orochi