This season pass for Batman: Arkham Knight delivers new content every month for 6 months, featuring new story missions, more supervillains invading Gotham City, new legendary Batmobiles, advanced challenge maps, alternative character skins, and new drivable race tracks.

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.