RollerCoaster Tycoon is a popular simulation video game series where players design and manage their own amusement parks. The game allows users to create custom roller coasters and attractions while balancing finances, customer satisfaction, and park layout. Players can also manage staff, set prices for rides and food, and respond to the needs of park guests. The series has been praised for its engaging gameplay and creativity, making it a favorite among fans of simulation games since its initial release in 1999.