Return to Castle Wolfenstein is a first-person shooter and a reboot of Wolfenstein 3D. The player's arsenal includes among others a Luger, MP 40 submachine gun, Mauser rifle with sniper scope, flamethrower, dynamite and grenades. The game also features a multiplayer component in which players are split into Axis and Allies sides with each a set of objectives to complete.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.