SCP-035's containment chamber is comprised of four rooms. The room to the right requires a level 5 keycard to access. It is a control room containing some filing cabinets, tables, and a control panel with two levers: one controlling the door to the small chamber in which SCP-035 is kept and one controlling the gas valves that will flood said chamber. A document can be found on top of one of the tables.
The second room, a small storage room with a 4-digit passcode lock can be accessed from this room. The code for this lock is 5731, which the player learns from SCP-035 in an attempt to gain their trust. Inside the storage room is shelving containing SCP-035's document and a pill of SCP-500.
The third room is a small airlock-type room that leads to the fourth and final room. It also contains a storage area with empty hazmat suit stands.
The fourth room is the chamber SCP-035 is stored in. The only notable feature in this room, aside from the blood-coated walls, is a display case that the mask itself lays on. A radio and a metal panel of SCP-148 can be found amongst some debris from a hole in the wall, along with a scientist wearing SCP-035.
When the player releases SCP-035, they can enter its chamber. Once it is entered, several tentacles will begin to rise from the ground and attack the player. As an added threat, staying too long inside the main chamber will cause hemorrhaging, resulting in major