Red Orchestra 2: Heroes of Stalingrad, the leading tactical multiplayer WWII shooter on the PC, will take the award winning Red Orchestra franchise into the next generation of gaming. Cutting edge graphics and audio built using the Unreal Engine 3, inventive features and streamlined realism will deliver an unrivalled tactical shooter experience.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 “MY GAMES” tab and start downloading.