The Last Of Us Walkthrough Part 72 – Chapter 11: The Firefly Lab (The Hospital: Sixth Floor)

Open the door and go straight across. On the counter-top you will find an Artifact: “Surgeon's Recorder”. Now duck behind the counter-top and head over to the left. Just around the corner there is a  Shiv Door. Open it up and grab everything you can inside. This will give you a lot of ammo, Crafting Items, some Supplements and be sure to grab the Firefly pendant sitting on the desk.

Head over to the right of the door you came in now. Just from the edge of the reception desk look to the right to find an open door. Inside there you will find more Crafting Items. If you look on the desk on the right from where you entered you will find an Artifact: “Marlene's Recorder 1”. Search the rest of the room to find more Crafting Items. Now you will want to to turn around and head through the lit-up double-doors.

Once through the doors go over to the right and go into the tent ahead on the left. There you can find some Crafting Items. Head into the second portion of it and look on the table on the left-hand side. You will find an Artifact: “Marlene's Journal”. Grab it then head back into the hallway and start down it toward the “Surgery” wing. Look out the window when prompted with “L3”. Pay attention to what is happening in front of you. There is a firefight brewing. The problem is they have Assault Rifles and are armored. This means that whatever weapons you have with Armor Piercing are now your best friends.

Head across the first doorway and sneak over to the right. Slip up against the right-hand side of the door and you will find a bottle. If you need it, grab it. You will probably want it. There are a lot of Fireflies on the other side of that wall.

Continue over to the right and slip into the doorway that is not lit up. Slip over to the right and use the next door you find to move forward. Stay focused on the Fireflies in front of you using Listen Mode. If it looks a little tough to handle then either lob a bottle/brick or throw a Smoke Bomb in and follow it with a Molotov or good old strangulation. Still, lobbing bottles and bricks with a follow up of a Molotov is a great way to quickly clear large tracts of this area. Once you have head down the main hallway over to the “pediatrics” wing. Go on through the door and Joel will once again barricade it.

Once inside Pediatrics turn to the right and go into the first room on that side. Open the door and look on the table on the far side of the bed. This will give you the artifact: “Marlene's Recorder 2”. If you have gotten everything thus far, this is the final Artifact. Now just head on down the hallway to the one back-lit door. Go on through it and then through the door beyond it. You will see Ellie on the operating table. One of the Doctors will threaten Joel. Just walk past him and grab Ellie.

Now it is time to make a run for it. Move on through the hospital and make sure to run over to the right. You want to keep away from the Fireflies. From there head toward the lit elevator a ways down the hallway.