Call of Duty: World at War immerses players into the most gritty and chaotic WWII combat ever experienced. Players band together to survive the most harrowing and climactic battles that led to the demise of the Axis powers on the European and Pacific fronts.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.