Secret Cars
To earn the secret cars, satisfy the conditions below: 

     PCS: Clear the First stage within 4 min. 
     GTI: Clear the Second stage within 4 min. 
     DBL: Clear the Third stage within 4 min. 
     VPR: Destroy $1 million on the First stage and pass the level in the time limit 
     ELS: Destroy $2.5 million on the Second stage and pass the level in the time limit. 
     360: Destroy $2.5 million in the Third Stage and pass the level in the time limit. 
     F1: Pass the First Stage with no damage 
     PLC: Pass the Second Stage with no damage 
     TNK: Pass the Third Stage with no damage 
     GTK: Drive through the speed checker in level 2 at more than 114 mph. 
     SSP: Drive through the speed checker in level 2 at more than 144 mph. 
     RCC: Located in the back-left corner of the mall in level 3.