In this spoiler free chapter of our walkthrough of The Last Of Us 2 we have prepared a detailed description of The Descent stage. Abby and Lev have fallen down and have to cross through the infected building.
Searching for the mask
Somehow you'll fall into the pool. Get out of the room, walk through the exercise room and walk through the door to enter the staircase - you won't be able to go back to that location anymore, so it's a good idea to search everything in the area.
Go down and walk to the door marked with number 19. Abby will identify the mushrooms in the area. Lev will stay outside and your job is to find a breathing mask for him. Search the next rooms and try to remember the layout of the rooms (your way back).
After you pick up the mask, some stalkers will spawn in the area. There are plenty of enemies, but a quick escape and run won't be the best option here. It's better to walk slowly towards the door and move away from the mutants that will attack you. A shotgun will also be useful to quickly discourage enemies from attacking you.
Return to Lev and give him a boost so he may reach the upper floor. The boy will drop you a fire hose - use it to get down.
In one of the rooms, a stalker will emerge from the wall. From now on, from time to time, mutants will suddenly come out of such characteristic walls. Stay alert and try to neutralize the threat quickly.
Join Lev. Jump downstairs, into the next room. There's a Clicker lurking in the vicinity, so try to walk around the monster from the right (don't jump directly into the room with the enemy).
One of the rooms leads to a very interesting item. Cross through the wooden board and pick up the flamethrower. The weapon is very useful against mutants, especially those that prefer to charge at you and attack you in short distances.
After that, walk down on the rubble. As you descend there will be two Clickers waiting for you and one Shambler a little bit further.
Go even lower. You have to break through to the door that separates you from the infected. Unfortunately, there are many enemies behind the door.
There are a lot of mutants in the area. Fighting them can be quite troublesome, especially due to the Bloater which wanders around in the area. You can use a slightly different maneuver if you come across a Bloater which is guarding the passageway. For example, throw a brick a bit in front of the monster to lure it into other spot.
If you notice that the enemy is going straight ahead, quickly go right out behind his back and then right.
From here, you can quickly get to the elevator and escape from the area without getting involved in combat. Now you have to jump lower and follow Lev. After a while, you will finally reach the exit of the building. Lev will once again be your guide. Follow him. You'll finally get close to the hospital. This will end the stage.