Keep to the right and you go down a slope.

On your way to the infirmary, you need to cross wolf territory. His body is in the wolf-infested area at the start of the episode. The first key is on the corpse of a prison guard. You will need to get at least Locker Key #3 because it contains a bloody note. There is no achievement related to the number of Lockers opened. This section deals with the three (3) Locker Keys necessary to open the numbered lockers in the guardhouse in Blackrock Penitentiary. You need Locker Key #3 to open the locker, see below for details on where to find it. The final note is in Locker #3 in the prison guardhouse. The next note is inside the old Substation, laying on the table next to an open book. The second note is laying on the crafting table inside the trailer of Foreman’s Clearcut. In the back of the bus (last seat in the back) is the first bloody note. On your way there, you’ll come across the car depot with a bus in it. The first note can be found right after you are sent out to the infirmary.

Locate all four bloody notes in Blackrock region.

This section details the location of all four (4) missable bloody notes scattered across the Blackrock region.

Unmissable – gained after escaping from Mathis with Jace.

Unmissable – gained after Jace locks down the entire prison, saving you from Mathis’ wrath.

Unmissable – gained after picking up the detonators in the mine.

Unmissable – gained after destroying the machine in the steam tunnels.

Unmissable – gained after finding the high-grade morphine and returning to the prison.

This section deals with all achievements which are unmissable due to being part of the storyline of episode 4. How to Get Collectibles and Achievements (Episode 4) Story Achievements

How to Get Collectibles and Achievements (Episode 4).

The long dark sprinting