Gameplay
The simulation offers the ability to race in single events or a full Championship season (made up of all the tracks installed and available on the player's computer); to take part in associated practice, qualifying and warm-up sessions; to set up and customise the car both on-track and in a dedicated "garage" feature; and to race head-to-head against another player by connecting two computers, either via modems running at least 9600 bit/s or via a null-modem cable attached to the computers' serial ports.
Read more about this topic: Indy Car Racing