 What's the smallest backroom's level? I'm sure when you think of levels inside of the backrooms, you probably think of these huge expanding hallways, massive areas, and non-euclidean geometry, the opposite of small. But there are actually several ones that are just downright claustrophobic. Level 974, or Kitty's house, is just a couple of rooms, a bathroom, and a hallway. It's a pretty safe level though, so it doesn't really count as claustrophobic. Then there's level negative 319 that comes to mind. This level is the size of a small suburban house, but if you stay in the small house for too long, you eventually decay into dust. But I think that the smallest level, by far, is actually level 77. It is legitimately just the length of one train car. Like that's the entire level. It's one train car. That's it. Nothing else is here. The real smallest level is your IQ!