Copy protection system
From Stunts Wiki
Stunts includes a form of copy protection. Each time after running the original executable file, player must enter a specific word from game manual before being allowed to race. If the player fails to complete the phrase three times, the next race will still load. However, the player is informed that the car's security system is not disabled and the car crashes.
The codes for the 4D Sports Driving version are different, and there are a lot more of them.
