I'm playing through the game non-lethally, and I'm trying to save Malik. It's hard enough non-lethally since all the non-lethal weapons are single-shot slow-firing poor-accuracy, but I've got a problem that when the bot lands and I EMP grenade it, the explosion kills one of the attackers. Does that mean that I no longer qualify for the achievement?
If enemy is hit by robot's self destruct explosion he is dead and it disqualifies you,but if he is hit by emp he will only be stunned and you still qualify as non-lethal.
Don't forget you can drag(E hold) stunned enemies away before the robot self destructs,you will have about 6 seconds.And be careful of exploding barrels.
Here's a video,it has some minor guidelines in description to help you.
If when you target the body it has a Skull instead of zz's then yes it disqualifies you from receiving the achievement.
Try to draw enemies towards you (and away from the robot) before throwing the emp.