Rostok is a region where you'll be spending most of your time midway through the story of Stalker 2: Heart of Chornobyl. Players who love exploring the zone outside mission might have visited Rostok early and stumbled upon the Military Depot with a locked safe. To open said safe, you'll need to find a code that's been split into three parts and scattered around the area.
Thankfully, the locations aren't quite far, so you won't have to travel long distances. The second part of the Black Sheep side mission in Stalker 2 sends Skif to help retrieve a Flash Drive with valuable data for a scientist, Trachuk.
Once players head inside, make a left turn and head into the main sleeping quarters of the soldiers. The area is covered with gravitational anomalies, so safely head right from the doorway and inside the hole in the wall. You'll find the Rostok Military Depot safe inside. To find the code for the safe, you'll need to find three PDAs that contain a part of the code. After that, you'll need to enter the combined numbers into the safe to unlock it.
Let's start hunting down those PDAs. The first PDA is actually right next to the safe in the corner of the room with the skeleton.
Pick it up to reveal the first part of the code, After that, you'll need to exit the Rostok Military Depot and turn left after exiting the building. Moving around the side of the building, you'll enter another section of the Military depot with a locker room in the back.
