It's a great strategic FPS game... not just fire everywhere like a madman. Great weapons and a lot of fun.
The enviroment recreated for the developers it's amazing, you will find intelligent enemies trying to place an ambush for you (not ever but it´s still interesting). You can put traps with grenades and TNT or use rocks to turn aside their attention and later put a bullet in his head.That's just great!.
If i can do improvements in the game i work in the sound track because it's a little repetitive.
In summary: it's a great looking game with great tactics improvements, a decent AI and a solid history.