SCP-398 is contained behind a reverse-airlock style containment chamber locking mechanism consisting of at least three steel doors and an atmospheric reduction system. A minimum of two guards must be stationed at the doors, remaining at a 50 m distance from the entrance to the SCP.
Euclid
Hallucination
SCP
Spacetime
Structure
Telepathic
Description
SCP-398 appears to all subjects as a hallway of some description; however, details differ between accounts. It is first seen as a hallway with white walls, plain wooden doors twenty [20] metres apart and approximately two [2] metres high, and brass handles, with no special attributes visible. This detail is consistent across all accounts. It was found on location at [DATA EXPUNGED] and upon investigation, a Dimensional Containment Site was set up around it. The remainder of the original building surrounding it is unremarkable and has been demolished as such.
Addendum-398-A
Agent ██████ sent to research subject, equipped with a hand-held video camera with transmission feed. Agent ██████ travels down the hall.
Agent ██████: The hall… it's changed.
Transmission shows no change in the hall's appearance.Control: Changed? How so?
Agent ██████: It's different from when I walked in. Dark wood-paneled walls. Red carpet and Monet paintings. I like it.
Agent ██████ continues until the appearance of several doors. The door is similar in design to others in the location.
Control: Agent ██████, open the one on the immediate right.
Agent ██████: Yes, sir.
Agent ██████ opens the door to reveal an unpainted and unfurnished room.
Agent ██████: It seems to be a cafeteria.
Control: A cafeteria? Is there anyone in it?
Agent ██████: You can't see it? There's no one in here, just tables, chairs, and a buffet-style layout. Smells real good and I haven't had lunch yet.
Agent ██████ opens the door. It is identical to the first room in appearance.
Control: A bedroom?
Agent ██████: Yes, a child's room. The one I wanted from a catalog when I was a kid, because it had Spider-Man sheets. We couldn't afford it.
Agent ██████ exits the room and opens the one next to it. Again, it is identical to the first two.
Agent ██████: She can't be here.
Control: What, Agent? What's through this door?
Agent ██████: … my old girlfriend. But she's married now, expecting a kid. The… person in the room can't be her.
Control: Agent ██████, please return now.
Agent ██████ lowers the camera and only the floor can be seen.
Agent ██████: I want to make it right, baby. Shhh, it's okay, don't cry. It was all my fault.
Control: Agent ██████? Did you hear me?
Agent ██████: I'm so sorry I let you go. Don't you worry, it won't happen again.
Control: Agent ██████, you will turn around, close the door, and return to the outside. That is an order!
Agent ██████: With all due respect, sir, no. I can make it work this time.
At this point, the camera is lifted and then the feed is abruptly ended.
Addendum-398-B
After loss of Agent ██████, Class-D personnel are to be sent into SCP-398.
Personnel D-193 and D-216 are sent equipped with hand-held video cameras to explore further.Transcription of audio follows.
Control: Right, you two. Continue onward.
D-193: Understood.
Transmission shows the same hall seen in Addendum-398-A. D-193 appears to be in front of D-216. D-216's feed shows D-193 walking ahead of him.
D-193: There are doors. Shall I open one?
Control: No. Continue onwards.
The class-D personnel continue. After a few metres, D-216 gasps.
Control: D-216? What's wrong?
No answer is heard.
D-193: He… seems to be unconscious, sir.
Control: His vitals have dropped out. He's dead. Leave him and continue, 193.
D-193: Roger, sir.
██ seconds pass.
D-193: The hall's changing, sir.
The feed shows no change.
Control: Describe.
D-193: It's starting to look like the corridor outside of my old cell. I never wanted to see this again. But it looks like it gets better just up ahead.
Control: Noted. Open the door to your left, 193.
D-193 opens the door. It is identical to the rooms seen in Addendum-398-A. A burst of breath is heard from D-193. His heart rate rises.
Control: What is it, 193?
D-193: It's the basement we had in a house I lived in as a child. I always hated it, I never went in.