If the game fails to start, you likely need to install the DirectX End-User Runtimes and Visual C++ Redistributables (often included in a Redist folder inside the ISO).

Because this is the 2022 version, it requires DirectX 12 . If you are using an older GPU or an older version of Windows 10, the game may not launch.

This means the original game files (which are over 25GB) have been heavily compressed to make the download smaller. During installation, the computer "unpacks" these files back to their original size.