Resident Evil 4 Separate Ways has arrived, a remake of the Ada Wong focused mode from the original game. This DLC follows Ada on her mission to find the mysterious Amber and escape from the horrors of Las Plagas. Like other Resident Evil games, Separate Ways features plenty of survival horror mainstays, including door puzzles. Here's how to solve the door puzzle involving lithographic stones present in Chapter 4 of Separate Ways.
Where to find the missing Lithographic Stones
About halfway through Chapter 4, Ada and Luis separate paths, with Ada being assigned the task of locating the three ingredients needed to produce medicine for suppressing the infection. Exiting the Fortified Tower using the grappling hook, you will encounter a forward hallway and a small staircase to the right, guarded by two enemies. Inside the room at the base of the stairs, you will come across a Lithographic Stone Door. This door will require you to exchange the four stones in order to align them with the damaged images on the door. Although two stones are missing, you can find the first one on the bench directly across from the door.The first stone is situated directly opposite the puzzle door. To find the second stone, backtrack to the blocked hallway and move the bookcase aside. Proceed to the end of the hall where you will encounter the Merchant. In the corner of the room, you will find the second stone, which is located across from the Merchant.The second stone is positioned across from the Merchant.How to solve the Chapter 4 door puzzle
Here is the solution for the Lithographic Puzzle Door. Return to the door and insert the two missing blocks as depicted above. Each stone block should only have one side that matches the images on the door. To determine the correct side, ensure that the color and border of the image aligns with one of the four designated spots on the door. If the color and border do not match any of the four spots, utilize the other side of the block. The four correct images are not duplicated. Once you have correctly placed the four blocks, the door will open.