Must own at least one episode from Batman: The Enemy Within - The Telltale Series to use this add-on.The Batman - The Enemy Within Shadows Mode brings a captivating new look to the storied Telltale Batman games. Enhanced with hand recolored gameplay and remastered textures, replay your favorite Telltale Batman episodes and experience the twisted world of the Dark Knight in a sinister, new way.

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.