Kill 9 enemies with A-10 strafing runs in "Scorched Earth."
About a quarter of the way into the "Scorched Earth" mission, you'll be given the chance to deploy some A-10 strafing runs. Simply select where you want it to start then place the next marker where you want it to end. This is pretty easy achievement because you pretty much need to kill all the ground units and there are plenty more than 9.
When you see a group, watch where they're running to or grouping. Then quickly place your first marker ahead of them and then make your strafing run line as long as it'll go and then place the 2nd marker. Once the attack is launched, you should get some kills but it'll take a few runs to get a total of 9. For some reason, a few guys seem to survive even though it looked like they were right in the middle of the attack.
To be on the safe side, I did this on Regular difficulty, but this can also be done on Recruit difficulty. I don't know if it was a glitched copy or not, but I saw a friend of mine get it on Recruit, so it's possible on ANY difficulty. All you have to do is just kill nine enemies in a strafing run with the air support. You don't need to do it in one strike. I did it within three strikes from air support and the Nein achievement popped on my screen. Took me three tries to get it done on Regular difficulty. No problem!
I didn't realize I could combine all the A-10 passes for my kills. I did manage to do it in one run on recruit. I waited for the next group of enemies to exit behind the first tank and had to time it so that they were with the 3 or 4 guys behind the car in front of the tank. It took several tries. Would have been much easier to just miss the tank and keep hitting the guys...
Spent 30 minutes trying to get it in one run on recuit. Can confirm multiple runs works, just get the 4/5 by the cars in front of the tank with the first run and then 6 more appear out of the building after you destroy the first tank if you still don't get it just leave the tanks and pick off the last few guys.
This achievement is garbage. I watch #1 and #7, but those vids have WAY more enemies than I do. I tried it on Veteran AND recruit. Veteran gives you 10 enemies and Recruit gives you only 5. What am I missing? Neither videos helped one bit.
This achievement, you don't have to get it in one run, you can use multiple strafe runs. Just make sure you don't destroy the tanks and you're not wasting time or else you'll move to the next objective or the tanks will kill you're team in the other building.