Objective: Find a way out of the cell
When we regain control of Lara, we’ll be in a cell. Look on the wall opposite the door to find a pipe, move up and interact with this to break it loose. Head over to the right hand wall of the cell (when facing the door) and bash down the weak section.
Proceed through the gap that opens. In this room you’ll find the Recurve Bow and Rope on the table. This combination of items will allow us to pull down the objects/barriers wrapped in rope that you will have no doubt seen on your way through the game.
Objective: Create an exit
Return back to the cell and use a Rope arrow on the roped section of the bars above the doorway to pull it down. Now climb up and through the opening that this creates for a scene.
Rescue Jacob from the gulag
Objective: Escape the prison with your new friend
After the scene, check out the desk across from the cell door for a Document [11/26]. Check out the dead end opposite the door Jacob went through to find a chest containing Relic [06/18 – Cigarette Case ].
Head through the open doorway and down the stairs. In the open doorway at the bottom you’ll enter a storage room with lots to loot. There is a Document [12/26] on the desk in the center of the room beside a film reel you can interact with to watch a series of photos in a slideshow. Along the right hand wall is a Strongbox [05/14 - Weapon Part: Compound Bow Part 02] and a bin with some reagents.
When you are ready to continue, head over to the door in the far left corner from the entry and break it open with the pickaxe.
As you enter the door, grab the crate of Salvage on the left before proceeding up the stairs. Scale the ladder at the top before climbing through the open window on the left for a scene.