This chapter contains a complete walkthrough for Welcome, one of the levels that is a part of Chapter 4 of Outlast II. Inside, you'll find additional tips that will help you complete the mission in a timely fashion. The walkthrough also marks the locations of occurrences and notes found in the course of the level, as well as the locations of batteries and bandages which will prove to be very useful during your journey.
You'll begin the level in a shed which was hiding the tunnel that you've used to escape the school. The situation outside is a bit unnerving, as you can see blood raining down from the sky. Point the camera at the bridge and record the occurrence (Rain of Blood #1). Proceed forward and use the stairs to enter the mine.
Explore the area until you've reached the first corpse. Then, turn left and enter the only accessible building in the near vicinity. Unfortunately, the door closes once you've crossed its threshold. Proceed forward - you should approach the barrels seen on the screenshot above. Turn right  and get behind them to find a new note (Knoth's Gospel Ch. 13 #2). Return to the corridor you've used previously, and proceed forward  to continue with your task.
Make your way through the following rooms and ascend to the floor above. Once you're up there, get through the narrow beam and reach a large mechanism found in one of the rooms. You should see a waggling chain and a light source in the distance - approach it.
You'll be subjected to a short cut-scene. Once you're back with Blake, make your way to the narrow passageway shown on the screenshot. Use the door to complete the level.