Automobili Lamborghini - Platform: Nintendo DS

All cars:
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To get all the cars, at the Main screen, press the R button 6 times. 
You should now be able to select every car in the game! 

Reversed tracks:
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Complete championship mode under the "Novice" and "Expert" difficulty 
levels. 

Hidden cars:
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Complete one of the following series with the corresponding setting 
to enable a bonus car. 

Porsche 959:
------------
Arcade Basic series (Novice) 

Ferrari 512 TR:
---------------
Arcade Pro series (Novice) 

Bugatti EB110 GT:
-----------------
Normal Championship series (Novice) 

Ferrari F-50:
-------------
Arcade Basic series (Expert) 

Dodge Viper GTS:
----------------
Arcade Pro series (Expert) 

McLaren F1:
-----------
Normal Championship series (Expert) 

Short cut:
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On the race with the castle and dirt road to the side, there will be two 
rock formations that your car drives under. Immediately after driving under 
the second formation, make a hard left turn. If done correctly, your car will 
pass through the wall and reach the short cut.