it would be very close between black ops or cod 4 mw cod 4 all i played was core tdm and it was great, it wasnt till black ops that i started playing hardcore objective game modes. i would have to say cod 4 tho cuas you didnt have to worry about random kill streaks it was you get kills with your gun not rely on dogs and other streaks to do your work for you while you sat in a corner camping