No escape from Arkham City…the sprawling mega-prison in the heart of Gotham City, home to its most violent thugs and infamous super villains. With the lives of the innocent at stake, only one man can save them and bring justice to the streets of Gotham City… Batman.

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.