Pincushion - 25
Pin 50 enemies with the Bow in the Story Mode campaign.
Not difficult, but will take some time. On the mission in the beginning of the game, when you and Slade have to go through an enemy base to cross the valley. When you first enter that base, you and slade will split up. In the next few rooms you can get some very easy pins and knife kills. When you get to the part where you must climb up the flights of stairs, save and kill yourself to restart this segment. You can average 3-4 pins per trip, and even more knife kills per trip. Make sure you save before killing yourselves, OUR IT WILL NOT COUNT.
What is the mission name where you can do this?.
Call Of Duty 4
BRFC | Arte Et Labore