COD sucks BIA doesnt...

in more detail

COD is basically every man for himself for the multiplayer part, no teamwork, wheras BIA lets you control a squad, and you have to use teamwork. A good way is to have your squad provide covering fire so you can flank around your enemy and take him out. No Crosshair means ironsights actually have a purpouse, and it is hard as hell to hit someone from a distance. The Single Player is much like the multiplayer, except that you start by yourself and with a colt, and you meet up with another sgt, and pick up more and more airborne as you go along and form a squad, hence the name "Brothers in Arms".