Off the top of my head...
BF3, BFBC2, BF2, Counter-Strike 1.6/Source/GO, Day of Defeat, Day of Defeat: Source, TF1, TF2, Red Orchestra 1 and 2, Operation Flashpoint, Delta Force 1, Delta Force 2, Delta Force Land Warrior, Black Hawk Down, every Call of Duty, Insurgency, the first few Medal of...