Simulation style racing games strive to convincingly replicate the handling of an automobile. They often license real cars or racing leagues, but will sometimes use fantasy cars built to resemble real ones if unable to acquire an official license for them. Vehicular behavior physics are a key factor in the experience. The rigors of being a professional race driver are usually also included (such as having to deal with a car's tire condition and fuel level). Proper cornering technique and precision racing maneuvers (such as trail braking) are given priority in the simulation racing games.