Quote Originally Posted by TheRealSpiders View Post
All of them, at once, you wont.

So playing through Deus Ex: HR for the pacifist achievement, I may have killed a dude with the stun gun, I will light myself on fire if this is true.
The stun gun is fine to use, as long as the guy has the Zzz symbol when you interact with the body then you're all good. It's the tranquilliser rifle that is glitched and often (if you shoot people in the head) will kill them rather than knock them unconscious. I played the whole game without a single lethal takedown that I knew of and didn't get the trophy. I was pissed. Only thing it could have been was that damn tranquilliser rifle.