The frag grenades and c4 achievements are for scoring those kills at once. ie one c4 kills 4 or more people.
I'm not sure about the phalanx turret issue. Can you repeat it? If your friend died during that streak it wouldn't have counted.
The frag grenades and c4 achievements are for scoring those kills at once. ie one c4 kills 4 or more people.
I'm not sure about the phalanx turret issue. Can you repeat it? If your friend died during that streak it wouldn't have counted.