For anyone having trouble with "Bezerkopath" or "By the grace of..."
Just to clear up alot of the misinformation floating around about these, I will tell you exactly how me and a friend did these today.
By the Grace of: you just need to, as Lynch, shoot someone in the leg or torso to bring them down, and with luck they will survive and writhe around in pain. you need to then use your shotgun and shoot them in the head. Note: this did not work on the first try, but on the second. even if they look dead, still put one in their head, the one I got my achievement on looked like he was dead, so there you go. We did it at the start of the withdrawal level. there are two guys just after you climb the fence. try it with both of them, if it doesn't work, just reload the checkpoint and try again
Bezerkopath: this will happen at the withdrawal level also. during the battle, as lynch, fight as normal, just make sure that you constantly keep an eye on the civillians, they should turn into cops, and then you must shoot 10-15 of them. this one is very glitchy. we got it on our third try. first time, they didn't wake up at all! second time, they only turned to cops for a few seconds. third time, got it. when they turn to cops, make sure whoever plays as kane does not move forward, but just keeps cover and stays still as long as possible. we believe that's what messed it up the second time, when kane progresses too quickly. its a pain but you shouldn't have too much trouble with patience
Good luck everyone