A FPS with an original story! What more can I say?
The game makes an allusion to another dimension, where the first World War never ended, and the present time is set in 1964, fifty years after the beginning of the war. The interesting fact is that most technology for nowadays is present, the leap made by the need from both sides in weapon development.
You are a soldier in the allied side, fighting a maniacal baron's army in a battle that many people long forgot the meaning or the reason for it. You'll get sniper rifles, assault guns and pistols. The catch here is that you'll only be able to take one weapon for each kind. The game was a first in this: you can take a pistol and the rifle, but not the rifle and the rocket launcher, for example. That makes you take dramatical decisions over which guns to carry.
You'll come across very intelligent oponents in the battlefield. Snipers are ruthless, so in covered areas you'll be crouched down and avoiding fire all of the time. This makes a real satisfying feeling when you take one down. Enemies can and will ambush you, even using dogs as decoys and most suprisingly, as kamikaze units. If you like animals, you'll be mad at this game, because they strap explosives onto a dog and let it wild...
Anyways, other than the extreme difficulty, the game makes you think, since you won't be able to go out with full guns blazing. Tanks will get you, mustard gas armed soldiers will gas you, so you'll need strategy and stealth to get by.
Iron Storm doesn't reinvent the genre, don't take me wrongly about this. It doesn't try to be inventive or anything, it just works as a very good game made in the well-stablished molds set by others in the FPS business. But sometimes not going off the path is a good thing and works.
Thanks for reading!