The Walking Dead: Season One (also known as The Walking Dead: The Game) is an episodic interactive drama graphic adventure video game developed and published by Telltale Games. Based on Robert Kirkman's The Walking Dead comic book series, the game consists of five episodes, released between April and November 2012. It is available for Android, iOS, Kindle Fire HDX, Microsoft Windows, Mac OS X, PlayStation 3, PlayStation Vita, Xbox 360, PlayStation 4 and Xbox One. The game is the first of The Walking Dead video game series published by Telltale.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.