"F1 Challenge" proved to be popular for online racing over the Internet through GameSpy, which allowed any player to find available games. "rFactor" has extended this in several ways. The central server is handled by ISI themselves, so finding other games is effectively the same. However, the central server will show all races and practice sessions over a web interface known as Racecast. There are also career statistics available for registered drivers. The game server can be run from a dedicated program, free from the need to render graphics. It can run mixtures of human and computer controlled (AI) vehicles.