I have a question and a tip...
Tip first. For the "iron fist" challenge, the counter does not reset if you restart at the last checkpoint. I got this challenge on mission 2 by rushing and melee'ing the first two troops, then restarted the checkpoint and did it again. Really easy method for solo.
Now my question. The challenge "make it count" is not unlocking for me, not even on ultimate badass on the last mission with the queen. Is that challenge broken or am I missing something? I'm using the service pistol, upgraded with only the laser sight (went to the pistols default settings too, just to test it out and still nothing). And I tried it against a soldier alien too. Did one of the games patches cause this challenge to break? How can I fix it or get around it?