Red Faction: Armageddon is a third-person shooter video game developed by Volition and published by THQ. It is the fourth installment in the Red Faction series. The game takes place on the planet Mars. It is set in the year 2175, fifty years after the events of Red Faction: Guerrilla.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.