rFactor 2

rFactor 2 is a PC racing sim built around modular customization and detailed physics modeling. You'll race on road courses with mixed vehicle classes, each car responding to track conditions, tire wear, and setup changes through what the developers call dynamic surface modeling. The AI adapts to your driving style, and multiplayer supports competitive online racing. Visuals lean toward functional realism rather than arcade flash. The sim's designed to be extended—custom cars, tracks, and rule sets can be added through community mods. It's aimed squarely at players who want granular control over racing variables and don't mind a learning curve steeper than most arcade racers.