(8) Reaching the sub-basement Deus Ex: HR Guide

CAREFULLY approach the stairs leading onto level 1. The area is mined, so if you don't want to set them off and lead to a massive explosion, you will have to crouch and move with CTRL pressed down. Go a bit lower and take care of disarming both mines. On the left wall there's an EMP #1 and on the right a concussion mine #2. You should of course take the mines with you.

Make sure that the mines are at least deactivated and only then go down the stairs onto level 1 (screen above). The game will now demand you explore this room in search of room 802-11, in which Eliza Cassan in supposed to be.