Chapter III - Flashback | Walkthrough Slender: The Arrival Guide
Last update: 11 May 2016
Follow the corridor towards the exit. Collect letter number 8 lying on the crates on the right and leave the mine. Go along the path and keep an eye on the fence - you should find letter number 9. Go further until you reach a fork in the road - take the road leading up and you should come across two stakes thrust into the ground, letter number 10 it attached to one of them. Turn around back to the fork and continue onwards - you will reach a cave with a flare by the entrance. Cross the cave to arrive at a building with a note (12) on the door. Head inside and look left - on the wall there's letter number 11. Click on the TV - watch a scene during which Kate writes down her notes. The woman, foreseeing the arrival of Slander Man, grabs the camera and flashlight...
As Kate, your task is to lock all windows and three doors as fast as possible. There are 8 of them in total - however which of them turn out to be open is purely random. You move in complete darkness with only your flashlight to help you. Start with the sleeping room and afterwards check all rooms upstairs as well as the corridor. Run down to the ground floor and close the front door. There are two rooms in the dining room, one in the kitchen as well as the back door. Close the garage door (by the bathroom). Two rooms with windows left - the living room and the music room.
At this point Slender will probably appear inside the house, coming in through an open window in one of those rooms. When you try to close it and get informed that there's no point as the monster is already inside, run through the dining room (to avoid running into him) upstairs. It's possible that Slender will get inside even faster and you will note him - then you will just be informed that you have to hide in your room. Rush to Kate's sleeping room and don't close the door behind you - it usually causes the game to crash. Instead, run to the window. If you've managed to close enough windows and were fast enough, you will be moved to the next chapter. If you close fewer windows, Slender Man will just keep lurking outside, your flashlight will eventually die, you will get lost and eventually die of boredom as you wait for the monster.
Notice: this part of the game lets you obtain another easter egg, which I'd recommend doing at the very beginning as it will force you to restart the chapter. Run out of the house and keep heading left until you reach the edge of the map. You will obtain an achievement - Not even a bug in this game will save you from me.