I finished The Missing Link recently, without firing a shot, throwing a grenade or mine, or using a Praxis Point. I thought this would qualify me for the Factory Zero achievement, which follows: "You survived The Missing Link using no Praxis kits, weapons, or explosives. Whoa."
I didn't get the achievement, though. I'm wondering if this is maybe because an enemy got hit by an errant fire extinguisher or explosive barrel at some point. (I can't seem to leave them be) Can anyone confirm or deny this for me?