Extreme G3
Break the sound barrier
Win the next race
Infinite ammunition
All teams and tracks
Extreme lap challenge
Always win XG career mode races
Double prize money
Infinite shields and turbos
StarCom team 
Quick start
Unlimited ammunition and StarCom team
Press L, R, L, R, L + R, Z after "Press Start" appears at the title screen. A message will confirm correct code entry. Note This effect lasts for only one race and must be re-enabled before the next one.Break the sound barrier
Reach a speed of at least 750 mph to break the sound barrier. Enable the "Unlimited shield and turbos" code to make this easier to accomplish.Win the next race
Press L + R + Z, L + R, Z, L + R + Z after "Press Start" appears at the title screen. A message will confirm correct code entry. Note: This effect lasts for only one race and must be re-enabled before the next one.Infinite ammunition
At the "Press Start" screen, press L, R, L, R, L + R, Z. If you entered the code correctly, a message will appear.All teams and tracks
At the "Press Start" screen, press L, L, R, R, Z, Z, L + R + Z. If you entered the code correctly, a message will appear.Extreme lap challenge
At the main menu, press L, R, L, R L, R, Z, L + R. If you entered the code correctly, a message will appear.Always win XG career mode races
At the main menu, press R, L, Z, L, R, Z, R, L, Z. If you entered the code correctly, a message will appear. This allows you to win a race no matter if you quit, lose, or die. Note: This must be enabled at the main menu before every race.Double prize money
Sent in by Madman At the main menu, press L, R , Z, L, R, Z, L + R. If you entered the code correctly, a message will appear.Infinite shields and turbos
At the "Press Start" screen, press L + R, Z, L + R, Z. If you entered the code correctly, an "Unlimited Energy/Turbo" message will appear. Note: The effects of this code only last for one race and must be re-enabled before the start of the next race.StarCom team
Successfully complete the game and win every trophy to unlock the Robotic team, StarCom.Successfully complete XG career mode to unlock the StarCom team.
Quick start
Hold Forward without pressing the Gas. As soon as "Go" appears, press A + X for a small turbo.To get a jump start when you begin a race, hold Forward during the countdown without pressing Gas. As soon as "Go" appears, hit the accelerator.