Steam Download Zip - File Better

Open Steam and click on that game. Steam will detect the existing files and only download what is missing. 2. Using the Official Steam Backup Feature

On the new PC, extract the ZIP contents into its own steamapps/common folder. steam download zip file

While primarily for save files, it has a "Steam Library Archival" tool that creates compressed zip backups ready for migration. Open Steam and click on that game

Now that we know Steam doesn't provide ZIPs, the question remains: how do you archive your games? This is steam download zip file