Marshall your savagery, and strike primal fear into the hearts of your enemies with the Beasts of War unit pack for Total War: Rome II.Comprising seven new battlefield units, Beasts of War brings further variety to Rome II's already diverse unit roster.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.