rFactor

rFactor is Image Space Incorporated's racing simulator focused on mixed-class road racing with ultra-realistic dynamics, immersive sound and stunning (for 2005) graphics. The simulation supports a full day-night cycle with smooth real-time transitions and projected headlights for nighttime driving. Multi-player mode supports driver swaps for full 24-hour endurance events.

The physics engine runs 15 degrees of freedom with advanced tire modeling, 4-link rear suspension support, engine boost modeling, complex aerodynamics, head physics with cockpit vibrations and detailed bump modeling. Career mode adds upgrades affecting vehicle appearance, performance and sound, with AI opponents customizable in type, strength and aggression. Vehicle economy includes mileage tracking, and ambient and track temperatures change throughout races.

The replay system supports clip splicing, freely movable cameras including the famous ISI Swingman, and AVI export with compression and size options. Multiplayer features RaceCast web reporting, dedicated server support, voting, IRC chat, boot/ban lists, security checks, and AI players. The open architecture is the real legacy: extensive modder support enabled a vibrant community where new tracks, vehicle classes and entire conversions extended the game far beyond its 12 stock vehicles and 14 circuits. Most modern sim racing standards trace lineage through rFactor.