"Futuremark Games Studio released the Unstoppable Gorg Demo that is free to play for both the PC and Mac. The demo is available on Steam for both PC and Mac, and there are also standalone versions available: http://www.unstoppablegorg.com/get/pcdemo for the PC, and http://www.unstoppablegorg.com/get/macdemo for the mac. With 4 levels from the full game (including the movies of course), corresponding challenges and Arcade mode, you can begin your career in stopping the unstoppable at your leisure."