This is a guide for the second part of the Death Factory mission which is called Decontamination. This guide explains how to complete Decontamination with the maximum score by showing you how to locate the silo entrance, how to disable the security, how to recover the evidence and how to reach the Silo on the hardest, purist, difficulty. After you have completed all the challenges for the Death Factory mission and completed Decontamination in the way this guide suggests you can expect 39,050 score from Decontamination.

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Remove the Evidence Unseen

At the start pick up a bottle from a table in the corridor then follow the corridor into the locker room. Go through the room and into the security room and pick up the evidence from the table.

Get to the Silo Unseen

Disable the security and hide using the cleaning tools in the room. Wait for a scientist to go into the bathroom and get out of it again:

Go into the bathroom and throw the bottle into the left corner of the bathroom ahead:

Take cover on the wall next to the door and wait for the guard to walk past. Garrote him, take his outfit and hide the body in the container nearby.

Go through the air ventilation shaft to the other side. At the other side turn right and go through the doors ahead. Once you have done that it is the end of Decontamination.