Standalone Client
Warzone can be played for free on the website, https://www.warzone.com, or via the iOS or Android app. However, it's also available as a downloadable native app for Windows, Mac, and Linux. This is called the standalone client. It is only available for members. Links to download are below.
Download Links
Installation Instructions
Windows
- Click the Windows download link above.
 - Once it finishes downloading, open it from your browser's Downloads.
 - Click "Extract all".
 - Give it a folder to extract to, such as to your Desktop.
 - Go to the folder you extracted it to and double-click on Warzone.
 
Linux
Same steps as Windows, except click on the Linux download link instead of a Windows download link.
Mac
- Click the Mac download link above.
 - Once it finishes downloading, open it from your browser's Downloads. (By default it's in "Downloads" folder which is bookmarked in Finder in the left bar)
 - Double-click on downloaded archive (zip) file.
 - The app should now be in the same folder. Click on it and open menu (on trackpad you just need to press with 2 fingers)
 - From the menu choose "Open" option.
 - A popup like this should appear: 
“Warzone” is from an unidentified developer. Are you sure you want to open it?
 - By choosing "open" option from menu you should see extra "open" button on the popup. Press it and you're done