Extreme-G 3 - Platform: Gamecube

Unlimited shields and turbos
----------------------------
Press 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. 

Unlimited ammunition
--------------------
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. 

Always win XG career mode races
-------------------------------
Press R, L, Z, L, R, Z, R, L, Z after "Press Start" appears 
at the title screen. A message will confirm correct code entry. 
This allows you to win a race no matter if you quit, lose, or 
die. Note: This effect lasts for only one race and must be re-
enabled before the next one. 

Win 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. 

Double prize money
------------------
Press L, R, Z, L, R, Z, L + R 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. 

Extreme lap challenge
---------------------
Press L, R, L, R, L, R, Z, L + R at the main menu. A message will 
confirm correct code entry. This unlocks an oval track for maximum 
speed. Note: This effect lasts for only one race and must be re-
enabled before the next one. 

All teams and tracks
--------------------
Press L(2), R(2), Z(2), 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. 

StarCom team
------------
Successfully complete the game in XG Career mode.

Alternately, successfully complete the game and win every trophy 
to unlock the Robotic team, StarCom. 

Quick start
-----------
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. 

Hold Forward without pressing the Gas. As soon as "Go" appears, 
press A + X for a small turbo.

Super boost
-----------
To make your bike go the fastest that it can ever go, make sure 
you have the Rear Blasters weapon. Then, activate your boosters 
by pressing A + X. Then, use your Rear Blasters at the same time 
by pressing A + X + Y. By doing this, you will boost much faster. 
Note: To get the best results, also enable the "Unlimited shield 
and turbos" and "Unlimited ammunition and StarCom team" codes.

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.