Since there is no native PC version, the only technically feasible way to play Forza Motorsport 4 on a PC is through emulation. The emulator of choice for this task is —a free and open-source emulator specifically designed to run Xbox 360 games on modern hardware. It is an experimental branch of the main Xenia project, offering the latest patches and features, which makes it the best candidate for trying to run a demanding title like FM4.
The short answer is that there is no official PC version of Forza Motorsport 4 Forza Motorsport 4 Download Pc Free