(6) Peaceful solution: Reaching the main area of the basement Deus Ex: HR Guide
Last update: 11 May 2016
From the conversation with Prichard you will learn that in order to question Eliza, you need to find room 802-11. It's very far from the starting point, so for now you should just focus on passing through the first location into the middle part of the basement.
Wait for the funicular to take you to the 2nd level of the basement #1. Get out and take a first look around the area. Notice the local security camera, which you will of course have to avoid. Additionally it's worth to check out the ammo crate (an EMP grenade, among others) and the palmtop lying on the bed #2 (login: demarbre, password: index).
Now I'd recommend heading back to the funicular, as in just a few moments two guards should appear #1. Wait for them to finish talking and split. One of them will go towards the nearby guard lodge, while his friend will start patrolling the area #2.
You can reach the middle section of the basement in a few ways. If you don't intend to kill anyone, the best solution would be to push the nearby laser barriers and follow the guard (screen above), using the fact that he doesn't need to manually turn off the barriers, but only get near them. A camouflage (Cloaking System) might also come in handy here, as you should keep in mind that going through a barrier with it active will not set off the alarm.
If you don't mind using force, you can decide to stun the mentioned enemy, both from a distance #1 or using melee combat #2. Make sure his body doesn't end up in the field of view of the security camera. In the end approach the body and start pushing his body towards the west. While it might seem odd, there's a very good reason for it - even though he's stunned, the barriers will still keep turning off when his body is nearby.
Another option implies turning off the laser barriers, but for this to be possible you would have to use the Move/Throw Heavy Objects augmentation and place the big crates in front of the security camera #1, cleverly blocking its field of view. Only after doing so should you interact with the barriers control panel #2 and solve a level 1 hacking mini-game.
The last possible option implies breaking through the fragile wall fragment on the left #1. You would of course need to have the Punch Through Walls augmentation and additionally make sure that no guard notices you do that. After destroying the wall, go through the ventilation shaft (choose the tunnel on the right) #2.
Regardless of the chosen method, your goal is to reach the main area of the bunker (screen above), from where you will plan further actions.
Notice! The description of further actions can be found in Step 7 (Reaching the staircase).