About This File
Contains files for Atlantis, these are installed using "Atlantis Package installer".
- Install or reinstall Atlantis (has to be a clean install).
- Download this package containing .big files for languages.
- Download Atlantis Package Installer
- Copy the .BIG file you want to the install directory of the game.
- Start AtlantisPackageInstallforGOG.exe
- Load the .BIG Package, choose "Full Installation" and click "INSTALL".
- Now you can install "Atlantis Extended Cut Updater"
Languages: Dutch, Swedish and Polish
Source: GOG Forum post