Unzip the file and move the application bundle to the Applications folder.
On modern macOS, users may need to right-click the application, select 'Open', and confirm to bypass gatekeeper restrictions. BigBrother_AnotherStory-0.09.2.03-mac.zip
The file ...-mac.zip indicates it is packaged for macOS, likely requiring users to extract the app and potentially authorize it in System Settings if it is not signed by Apple. Unzip the file and move the application bundle