rFactor is a realistic racing simulator game developed by Image Space Incorporated (ISI). It was released in 2005 and is available for Windows, Mac, and Linux platforms. It is a single-player and multi-player racing game that allows players to race against computer-controlled opponents or other players online. It features realistic physics, damage modeling, and a variety of race types including circuit, oval, drag racing, and rally events. It also has a highly customizable graphical user interface, allowing players to tweak the game to their own preferences. The modding community is also very active, allowing players to create and share custom car and track modifications with the community. In addition, rFactor also features a powerful AI system that allows it to adjust its difficulty level to match the skill of the player.
The discontinued developer's website is no longer accessible.
Need for Speed is an arcade style game and rFactor is a simulator.