Using a great variety of gadgets you must make your way around the island, and the asylums halls to find and stop the joker. The game uses a 3-button combat system, but with a great number of gadget abilites which Batman can unlock. This makes for a very cinematic combat experience when fighting the Joker's goons.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.