Corporate Warfare

This achievement is acquired on the second trip to China, when Hugh Darrow contacts you and asks you to meet with a woman called Mengyao. She will give you a sidequest to recover a stolen data chip from some terrorists, and reminds you that Darrow wants the enemies left ALIVE.

While doing this mission, use non-lethal takedowns, or weapons like the Stun-gun/P.E.P.S/Tranquilizer rifle, and make sure no one dies through the Tranquilizer Rifle glitch. Once the mission is done and no one has died, you should get this achievement.