iRacing is a racing simulation game that allows players to race against  each other in real-time on virtual tracks. It features a wide variety of  cars and tracks and is used by professional drivers and teams as a  training tool. World of Outlaws Sprint Car Racing is a racing game that  simulates the World of Outlaws Sprint Car series, which is a  professional dirt track racing series in the United States. It features  sprint cars, which are high-powered race cars designed for racing on  dirt tracks.