Spec Ops: The Line
50 Achievements
15-20h
A Line, Held
Choose restraint.
20.4%
How to unlock the A Line, Held achievement in Spec Ops: The Line - Definitive Guide
For this achievement, shoot your gun up into the air let the civilians run away. Proceed on a bit, making sure not to kill anyone, and the achievement will pop. You can reload checkpoint and get the other decision
Video has both achievement decisions
If you missed either of these achievements during your playthrough goto mission select and choose Chapter 13, and proceed to the part where you must run and find your second team mate, here you will see a cut scene after which you have a choice to make.
A Line Held
For this achievement aim your weapon into the air and fire, this lets the local civilians escape, proceed on through the camp and avoid killing anyone as you go and this achievement will unlock.
Video Shows Both Achievements that are unlockable at this point
http://game-play.tv/video/H2OWB95BHM28/Spec-Ops-The-Line-A-L...
For this one, shoot into the air when you are surrounded by civilians at the end of the chapter. They will scatter and allow you to proceed. Make sure not to shoot anyone on the path to the exit, though it is tempting as you will have insults and a rock thrown at you. Once you reach the exit the trophy will pop and you can reload your checkpoint to obtain the opposite trophy if you wish.
At the end of chapter 13 you will come to a disturbing scene. After you find out some really bad news you can choose to show restraint or succumb to vengeance. You’ll get this trophy if you show restraint and not kill the citizens. Just melee one of the trouble makers by pressing and exit the chapter. Once you leave the trophy will pop.
If you need additional information or just prefer visual aids then refer to FLIPADELPHIIA’s video below.
Chapter 13, you will come to a part where you must find one of your partners in the town. After a cutscene, you will be surrounded by a large group of civilians. You can choose to shoot the civilians causing them to flee or shoot in the air.
For this achievement, shoot your gun up into the air let the civilians run away. Proceed, making sure not to kill anyone, and the achievement will pop. You can reload checkpoint and get the other decision or wait for your 2nd playthrough of campaign.