How am I supposed to kill the final boss on the Deus Ex difficulty?

I'm not upset—I won't actually pick the game up again—but I was expecting to earn the pacifist achievement when I just completed to game but somehow didn't earn the achievement. I can't think of any point in the game where I killed someone.

Either, I didn't get it because I didn't spot that a takedown I did was actually a lethal one,

some of the "crazies" at the end ran into a mine when chasing me and that counted as a death,

a robot exploded and killed someone, or I did something wrong with the last boss.

I ran to the center, hit all the pods switches then laser beamed her for about 5 seconds.

I think it took me about 20 seconds and I did it on my first attempt. This boss was by far the easiest boss to kill for me. Was I not meant to kill the boss this way for the pacifist achievement? How was I supposed to kill the final boss?

Here's a video showing how I managed to defeat the boss. Did I get a glitched final boss or is this how it is supposed to be done?

Solution 1:

They way you did it is legit.

But the other way you might want to try is:

1. Destroy the turrets or sneak up to the centre pillar.

2. Hit the switches to open the pods and hit the people in side with a non-lethal weapon or you can disable it with a level 5 hack or with a code I think given to you by Hugh Darrow.

3. This then causes a system overload of some sorts, at this point robots and crazies will come out and start looking for you.

4. You can take them out or do what I did and just hid until the system overload discharged.

5. The discharge will destroy the glass surrounding the boss, which you are then free to open lead upon or any other weapon of your choice :)

Solution 2:

If you have a laser rifle, you're perfectly capable of doing it your way (it won't cost you the pacifist achievement).

If you don't have the laser rifle, you have to disable all of the security before the glass lowers allowing you to shoot her.