Ace Combat: Assault Horizon
51 Achievements
74-90h
PS3
Hard Strike
Wiped out hostile ground forces with ASM.
43.0%
How to unlock the Hard Strike achievement in Ace Combat: Assault Horizon - Definitive Guide
Not quiet sure what the requirements for this is exactly but I got this online while playing Capital Conquest. Thew achievement popped when I won the game. I was just using ASM the whole match to kill everything on ground and ended up getting the Hero MVP too.
ASM is basically the ground attack version of DFM. Chances are this trophy will pop up during the mission pipeline. When you enter ASM (the game explains how) you need to take out all the targets, this is done very easily by flying slowly and using only your machine gun. In ASM the machine gun does not over-heat. Only use air to ground missiles if you are desperate.