Adjust fog color:
Select a non-series race. Hold L + R + C-Up + C-Down + C-Left + C-Right 
+ Down when the screen fades and wait until the track selection screen 
has fully appeared. Then, press Right until an option to adjust the fog 
color appears. 

Change screen position:
Hold L + R + Start on controller two and move the Analog-stick on that 
controller during a single player race. 

Five-O car:
Successfully complete the Sport Series.

Predator car:
Use the Five-Oh car to successfully complete the Sport Series. 

Mano car:
Use the Predator car to successfully complete the Sport Series. 

Semi truck:
Successfully complete the Do The State mode.

Dozer truck:
Use the Semi truck to successfully complete the California Cup.

Squirrel car:
Successfully complete the Light Series.

Insect car:
Use the Squirrel car to successfully complete the Light Series. 

Forklift car:
Use the Insect car to successfully complete the Light Series. 

Mountain Dew pickup:
Successfully complete the Heavy Series.

OL' truck:
Use the Mountain Dew pickup to successfully complete the Heavy Series. 

Camper truck:
Use the OL' truck to successfully complete the Heavy Series. 

Clover track:
Successfully complete the Sport Series week two. 

Mt. Fuji track:
Successfully complete the Sport Series week three. 

Oval track:
Successfully complete the Heavy Series week two. 

San Andreas track:
Successfully complete the Heavy Series week three. 
Information in this section was contributed by Danscodes. 

California track:
Successfully complete the California Cup week five. 

Mirrored series tracks:
Select practice mode and choose the mirrored version of any track. Once on 
the track, exit and begin a race in series mode. The series track will be 
the mirrored version.