Extreme G3

Enter the following codes at the main menu. If the codes are accepted
you will see a message.

Unlock every tracks
Press L1, L1, L2, L2, R2, R2, R1, R1, L1 + R1 + L2 + R2.

Unlimited turbo and shields
Press L1 + R1, L2 + R2, L1 + L2, R1 + R2.
You have to re-enter before you play the next race.

Unlimited turbo
Press L1 + R1, L2 + R2, L1 + R1, L2 + R2.

Unlock StarCom team
Press L1, L2, R2, R1, R1, R2, L2, L1.

Always win 1st place in races in career mode
Press L1 + R1 + L2 + R2, L2 + R2, R1 + R2, L1 + R1 + L2 + R2.

Unlock Xtreme lap challenge
Press L1, L2, L1, R1, L1, R2, L1 + R1, L2 + R2.

2x prize money
Press L1 + L2, R1 + R2, R1 + R2, L1 + L2.

Fast Oval Race
L1, L2, L1, R1, L1, R2, L1+R1, L2+R2

Free Money
To use this code, start a new career and pick your driver, then enter
the following: L1, L1, L1, L1, L1, L2, L2, L2, L2, L2, R1, R1,
R1, R1, R1, R2, R2, R2, R2, R2, L1 + L2 + R1 + R2
Then you should get as much money as you need

Infinite shields
Pause the game play and press L1 + R1, L2 + R2, L1 + L2, R1 + R2.

Infinite ammunition
Go to team selection screen and press L2, R2, L1, R1, L2 + R2, L1 + R1.

Open extra Tournaments:
Open the 500G class, finish the Caesium 250G tournament.
Open the 750G class, finish the Caesium 500G tournament.
Open the 1000G class, finish the Caesium 750G tournament.