A file with the .7z extension is an archive created by the open-source software 7-Zip. When applied to gaming, a "Game 7z" file bundles together hundreds of separate game assets—such as textures, audio files, 3D models, and executable code—into a single, highly compressed package. Why the Gaming Community Prefers 7z

If you try to open game.7z.001 and receive an error, you may be missing subsequent parts of the file.

: Navigate to the folder where you downloaded your .7z file (e.g., your Downloads folder).