Includes: 1 new map (Chernobyl Map) 3 new units 2 new abilities new models of skins Master your troops and enter the danger zone in the newest expansion to Operation Polygon Storm, Chernobyl DLC! An entirely new map inspired by the Chernobyl nuclear plant site will test your and your troops’ endurance, but you’ll have an arsenal of new units and abilities to aid your conquest.

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "LIBRARY" tab and start downloading.