Funny, many people complain about the mouse but it could always be a controlled instance, maybe? If you go to 2k gaming forum you will see about 30 threads dedicated to being pissed off at the mouse. Many of them also mention that the game will globally reset your mouse settings and not switch them back after you exit the game. Personally I havent noticed that but for me the game is almost unplayable with current mouse problems. I cannot, no matter how slowly I aim get a headshot. I hear someone, swing my mouse around and for some reason it keeps moving, sometimes even a full 360 before it stops