: Open the resulting ISO file or run setup.exe to begin installation.

: Right-click part1.rar and select "Extract Here" using software like WinRAR or 7-Zip .

: Ensure you have all parts (part1 through the final part) in the same folder.

: Definitive Edition requires significantly more space than the original 2010 release.

: If you encounter crashes, check for common Steam Community fixes regarding PhysX and launcher settings.