Featuring eight new levels, the Master Levels DLC provide unique challenges for Kung Fu warriors looking to test their skill. The Master Levels also feature endless co-op play for those eager to crush waves of enemies beneath their iron fists. Which duo will rack up the highest score in the world?

— Activation Details —

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.