Although I wasn't that impressed the first time I played it, and only completed the first mission before putting it away for a year, I now wish I had stuck with it. Then again, I'm glad I have something to play while waiting for the x-mas releases.

I discovered the most amazing thing in this game on campaign. Like all games these days, there are difficulty levels from novice to expert. This game changes up each mission where the more difficult levels require you to approach the mission more carefully and with thought. In example, on a novice mission, you progress in one part by blowing a hole in a wall to continue the path. On the same mission at a harder level, you don't have the demolition equipped and have to figure out a different way to complete the mission.

I've never seen this in a game before, and it sure makes for a lot better re-play value.