Includes: 1 New Map with boss - Armored Train 1 New Unit 3 New Abilities New Models of Skins The Polar Express DLC will take you to a new, cold map where your mission will be to stop and secure an armored train - the titular Polar Express. The new unit, new abilities, and a lot of new skins await you, Commander!To arms!

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.