Having just played the third storm ops, I can totally see the progression. First off, very well done this is a great shooter, worthy of anyone's favorite list. Weapon system is competitive, making you want score more and more to get those better guns. Enemy waves are challenging, but not rage-quit. Actually, my only negative of the game stems from the support cast-system (aka engineer, sniper, etc.) While these are clearly an excellent layer to the gameplay, at times it is hard to see their true value, as they die rather quickly, oftentimes before they even have a chance to provide any support. Game mechanics are incredibly smooth, and as always, the graphics are pristine. A challenging shooter-defense game, and a real treasure for those who care to burn a couple of hours.