Muscle Car 3
      
Hint:
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Submitted by: Mr.X

Go to the garage in career mode. Type any of these keys. 
(Note some might not work. I don't remember what they are):

m
n
s

If they don't work try others but there is a key that gives you $1,000 by 
pressing it once and at least one of these is correct. Enjoy your money!!


Unlock All Cars & Tracks:
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Submitted by: conner54

Start the game as usual. At the car/track selection menu, press the "U" key 
to unlock all cars and tracks.