If you have a PS2 and you are a Yu-Gi-Oh fan, you must buy this game. If you aren´t, just don´t get it. Seriously.
It would be the first one to the PS2 that would have the real rules.
The history is from the GX series, and is good. The graphics, the sounds, the animation, everything is good. This is the best game of yugioh in the market.
The only bad thing is that the characters doesn´t have voice, just a few monsters are animated and the graphics when you are in a 2d mode are terrible. Another bad thing: You can´t play against your real friends. This game is for one player.
You can buy almost 2500 cards, what makes this game the game with most cards ´til now.
The american version is coming out now, so I haven´t played yet. I´ll play and hope there are voices and other stuff.
If you don´t know how to play, don´t worry. The game has a method of teaching you like in a school, and makes it very easy. For those who liked the other games, like Duelist of the Roses and Monster Capsule Colliseum, just try it. It is different, but is a lot better.
Enjoy it!