MotoGP '06 is the official game of the sport and as such has the license to use every track, every track, every team and every rider, perfectly and realistically inserted into the game. This means that it also has all the tournaments, and since it is updated annually, it has all the real events planned in the game.
MotoGP 06 is very similar to the previous game, and in the end it was quite difficult to improve on what was already there. There are different game modes, the single player has a racing mode and you can create your own team, even design a uniform and everything that goes with it.