Walkthrough - Medical Facility - part 2 BAA Guide
Last update: 11 May 2016
Approach the doctor which will initiate a short cut-scene. You'll now have to defeat a small group of thugs. They won't be using any melee weapons, so it shouldn't be a big problem. Once they've been defeated free the doctor by pressing the action key. Return to the Upper Corridor when he's safe.
There's only one more doctor for you to rescue (Kellerman). Go back to the previous junction and choose an unexplored corridor with a blue line painted on the floor. Just as before you shouldn't be too surprised to find two inmates guarding this corridor. Eliminate them both and open a nearby door to arrive in the Patient Observation area.
Two other thugs are guarding a nearby passageway and obviously you'll have to defeat them before moving on. Head on to a large glass wall and listen to what one of the friendly guards has to say. Your objective for the time being will be to get rid of deadly toxins left by Joker. Turn on your detective mode, look up and grapple up to a small ledge.
Once you're at the top choose a nearby ventilation shaft and eventually you'll end up standing above the room filled with the deadly gas. Proceed to your right and aim at the first control panel (screenshot #2). Naturally you must use your Batarang to hit the panel.
This time you'll want to travel to your left. Approach the ledge and keep holding the action key to glide to a lower platform. After you've landed make your way to a nearby balcony. You'll be allowed to hit one of the inmates from here (screenshot #2), but instead of aiming at him try hitting the rope with your Batarang. If you've done everything according to the plan the inmate should land inside a small room located beneath him.
You must now make your way to other platforms located nearby. Be careful, because if you fall you'll only have about a second to return to safety. Once you've reached the last platform position yourself towards the western wall and throw your Batarang at the second control panel.
Your next step is to glide to a lower platform located in your vicinity, so you'll get closer to the room with the stunned inmate. Turn right once you've safely landed and locate the final third control panel from here. Once it's been destroyed you'll get rid of the toxins. Drop down to the ground level and talk to Aaron Cash (one of the guards).
You may exit this room in order to return to the Upper Corridor. Start heading east, towards the Sanatorium area (blue line on the floor). A single opponent is going to attack you along the way, however this isn't going to be an easy fight. For the first time you'll have to use your cape to stun him and to prevent him from using his knife. All you have to do is to press a corresponding key when a red icon will appear above his head.
Choose the door leading back to the Sanatorium and you're going to be automatically rewarded with a new cut-scene. Grapple up to the nearest gargoyle once the cut-scene has ended. Notice that there are three armed guards here. WAIT for them to begin patrolling different sections of the room, making themselves easier targets.
Theoretically you could try leaving this area right away, however I would recommend that you spend some time eliminating enemy troops. Be patient, neutralize single targets and wait for the situation to calm down after each attack. Once it's safe drop down to an area where you've talked to the doctors the last time you were here. Use the elevator to travel to a different floor.