Who doesn't love a game with NAZIs in it? Some people love shooting them, others love being them. This game uses the Arma 2 engine, so if you find Operation Flashpoint and Arma games too much of a brainstrain, go back to Call of Duty and Battlefield instead.
The D-Day DLC is also on sale today: http://store.steampowered.com/app/91333/?snr=1_5_9__300
The game and the addon were on sale at Amazon last week for about the same price.
It seems many people don't like this game, 5.5 as an average for critics and 6.3 for users. Not good.