If you are among the few who have never tried the award-winning Call of Duty: Modern Warfare 2 and you wonder why so much of success, Activision offers you the opportunity to test it today publishing a demo of the game. The demo, which as usual can also be downloaded from the web , is available this week only Live Gold users and allow us to address one of the missions of the game, namely "Cliffhanger", where we climb the mountain snow and insidious try to survive an intense battle.