As a fan of both Call of Duty 2 and 4, I looked forward with high anticipation to the COD 2 expansion. More scenarios, vehicles etc. While it has those, it also has a horrible propensity to freeze. When you restart, it's back to the opening of the scenario.When it's working, it tough and terrific. But mostly you're waiting for the freeze, and loss of the game-so-far. I do not experience this problem in COD 2 or 4, so I'm puzzled why this respected company would let a buggy product out the door. I'm driving a 24-inch Intel iMac, so computer capacity shouldn't be a problem.I've looked for downloads or patches to fix it, but no joy. In all, a crushing disappointment. s/Stan in Sarasota