Grand Pro Circuit is a hardcore racing simulator inspired by the open-wheel racing championships of the 1980s. Powerful and lightweight cars without electronic assistance require precise control, manual transmission, and complete control in corners, where the cost of error is especially high. The era of clean driving Races take place in fictional championships, evoking the atmosphere of the golden age of motorsport. The absence of radio communications, pit lane restrictions, and modern safety systems shifts the focus to the driver's skill. Every start and first turn becomes a test of reaction, calculation, and understanding of the car's performance. The simulation is based on a detailed physics model. Aerodynamics take into account altitude and atmosphere, tires simulate wear, temperature, and pollution, and the chassis responds with vibrations and impacts. Wheel contact, fluid pressure, and rubber compound selection directly impact stability and performance. Features of the game Fictional championships in the spirit of the 1980s. Cars without electronic assistance systems. Advanced aerodynamics and tire physics. Several rubber compounds with different behavior.