Awesome game. A masterpiece from Valve. If you havent played the first one, I recommed doing so as it will explain some of the events within this one. Singleplayer is great but the CO-OP is quite enjoyable especially with a friend for the "AH HA!" moments.

By far one of the greatest games I have played to date. If you are looking for a game that is team based where "Teamwork" is key to sucess, then this is the game for you. Beautiful graphics as well as stunning audio especially when set on the "War Tapes" option. Worth every dollar IMHO no doubt. *****