Automobile Lamborghini - Platform: Nintendo64

Hidden Bonus Cars 
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To find the many bonus cars in the game, such as a 
Ferrari Testarossa, Porsche 959, Dodge Viper, or Bugatti 
EB110, you must beat the Basic or Pro Series in the Arcade 
Mode. Each time you beat a series, you will receive a new 
set of cars. For even more cars, beat the Championship 
Mode on Normal and Expert. 

Reverse Tracks
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Like most racing games, Automobili Lamborghini makes 
you work for the hidden stuff. Beat the Championship 
Mode in Novice and Expert difficulty levels to get the 
reverse tracks.