Factory Zero

Factory Zero is an achievement/trophy in The Missing Link DLC for Deus Ex: Human Revolution. It is earned by completing the DLC without upgrading augmentations and using found weapons.

Overview
Factory Zero, like Pacifist and Foxiest of the Hounds achievements in Deus Ex: Human Revolution, requires adhering to a specific playstyle from the start of the game until the ending credits.

As the achievement description says, you must fulfill these requirements throughout the whole DLC:
 * Do not allocate any Praxis points, no matter how they were acquired: through level up or after collecting a Praxis kit.
 * Do not fire any weapons. Non-lethal and lethal take-downs do not count as "weapons" and can be used freely.
 * Do not throw grenades or place mines. (?) Do not throw red explosive barrels or gas canisters.

You can:
 * Pick up all items safely and sell them. However, it is not necessary because the starting credits (2500) are more than enough to buy all energy boosters and extra health items in the shop. Items include:
 * Pick up the rocket launcher parts for Quinn's Scavenger Hunt.
 * Pick up quest items: Burke's eye, Data Storage Devices and the Trauma Kit.
 * Use healing and energy restoring items.
 * (?) Praxis kits.
 * (?) Equip and aim weapons.
 * (?) Equip explosives.
 * (?) Trigger explosive wall mines.
 * (?) Trigger typhoon turrets.

Strategy

 * 1) Stealth
 * 2) Aggressive