(7) Defeating Barrett Deus Ex: HR Guide
Last update: 11 May 2016
The basic info, which is good to know about, is that the confrontation with Barret can't be resolved in a peaceful manner. Do not try to use a tranquilizer weapon on him, because you'll just waste your ammo. Luckily you'll have many opportunities to hurt Barret, so you do not need to worry too much, even if you haven't killed anyone before.
During the duel with Barret it is of course good to fight using a good cover #1, because boss' attacks inflict heavy injuries. I recommend using machine weapon, combat rifle or rocket launcher. If you've ignored my warnings or you were too lazy to look for good weapons, you can now examine two storage rooms #2, located in the north-eastern and south-western part of the room.
Monitor constantly your opponent's actions, watching out for grenades thrown by him #1. You have to run away from such places as fast as you can, because a grenade explosion can kill you easily. As for interesting methods of dealing him injuries, I recommend shooting at explosive barrels and use grenades (EMP too), which will stop Barret for a moment #2.
Fight until you'll see a cut-scene informing you about your victory. Malik will contact you soon, informing you that rest of mercenaries has left the facility in rush.
Reward: 2500 experience points.