All challenges - Enter "DOUBLEBARREL" as a rider name under the "Create A New Profile" option. If you entered the code correctly, a message will appear.
All riders - Enter "BUBBA" as a rider name under the "Create A New Profile" option. If you entered the code correctly, a message will appear.
All tracks - Enter "ROADKILL" as a rider name under the "Create A New Profile" option. If you entered the code correctly, a message will appear.
All tricks - Enter "FIDDLERSELBOW" as a rider name under the "Create A New Profile" option. If you entered the code correctly, a message will appear.
All vehicles - Enter "GENERALLEE" as a rider name under the "Create A New Profile" option. If you entered the code correctly, a message will appear.
Bonus ATVs - Successfully complete the ATV Academy Training and Trick Training to unlock the Dimension and Viper ATVs. Win over eight races in arcade mode to unlock the ATC ATV.
Championship - Enter "REDROOSTER" as a rider name under the "Create A New Profile" option. If you entered the code correctly, a message will appear.
Maximum stats - Enter "GINGHAM" as a rider name under the "Create A New Profile" option. If you entered the code correctly, a message will appear. Note: This code also increases the computer AI and makes the game much tougher.