Spec Ops: The Line
50 Achievements
15-20h
Marksman - Heavy Arms
Kill 150 enemies with any heavy weapon.
18.4%
How to unlock the Marksman - Heavy Arms achievement in Spec Ops: The Line - Definitive Guide
Edit: I've been told the that turrets do count now. I would still just do Chapter 10 Part 2 just to be safe though.
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At the very end of the game, if you let yourself live and kill Konrad, you're taken to the Epilogue. You're given the AA12. If you do this on the easiest mode, you can get 10-12 kills in about a minute or two. I think this is faster than 10-2 over and over again.
By the end of the game, I had about 80 kills with a heavy weapon. I'd kill everyone but one or two people in the Epilogue, then Reload Checkpoint. In about 10 minutes, I was done.
Weapons that count:
Grenade Launcher
RPG
M249 SAW
AA-12
The best place to "boost" this is during Chapter 10 - Part 2, where you protect the truck using a grenade launcher. Just keep killing enemies to progress. If you want, you can purposely die when you see the helicopter, and it will start you back at the beginning of this section. Otherwise, just use the weapons posted above, the most common being the M249 SAW, which you can pick up from tougher enemies.
These stats are cumulative. To unlock this trophy all you have to do is kill 150 enemies with any of the heavy weapons in the game. In Spec Ops heavy machine guns and launchers (both grenade & rocket) are considered heavy weapons. These weapons include:
Machine Guns
- FN M249E2 SAW
- General Dynamics GAU-17/A
- M134 Minigun
Launchers
- M32 MGL Grenade Launcher
- RPG-7
Note: Even though the AA-12 is technically a shotgun, it's kills count towards the Heavy Arms Trophy.
Any combinations of kills with any of the above listed weapons count towards the trophy. You do not have to get 150 kills with any single machine gun or launcher. These weapons are frequently placed throughout the game so you should have no problem finding one. In addition to those weapons you will get a chance to wield an unlimited grenade launcher during chapter 10 - Part 2. This trophy should come naturally during your quest for the platinum trophy, as you will be playing through the campaign 2+ times.
Machine guns:
- Browning M2A2
- FN M249E2 SAW
- General Dynamics GAU-17/A
- M134 Minigun
Rocket launchers:
- FN MK 13
- Milkor MGL Mk 1L
- RPG-7