MotoGP

In any sand pit, shift into reverse and your tires will turn green after a while. Continue this to turn them blue.

At the main menu, press Left, Up, Left, Left, B, Up, Left, Left, B, Y, Down, Up, B.

Watch the credits, at the end, you'll play a Space Invader shoot-em-up style game. The score you obtain are listed under your GamerTag on the XBL account.

In the MotoGP Xbox Live demo go to the credits section wait till the credits are done and you'll be taken to the Credits Shooter Mini game.

The solution to winning hard seasons is to get the #2 bike by winning the challenges. The way you get the bike is by taking the challenges that have a photo card. If you complete these, you will have won the #2 bike. Although the game gives the impression that the longer the race, the better off you are in the possibility of winning, this is false. All hard arcade races, seasons, etc. should be set to only 2 laps. The races are short, but the racers gear themselves for a 2 lap race, which can be used to your advantage. Before you begin your arcade race or season, set the #2 bike up correctly. Go to "Settings" and use the following values.

Transmission: Set to only 2 notches
Brakes: Set to maximum
Handling: Set to maximum
Acceleration: Set to maximum
Once you have these settings, you will win every arcade race, and will come in first for seasons you have to race. If you place second in a couple of races, you will still win the season. All challenges from here on in become relatively easy.