Cameras are traps in Hello Neighbor.
Between the Pre-Alpha and Alpha 2, the cameras were white and box-shaped, with a small light that shone red near the lens (orange in the pre-alpha). Alpha 3 changed the design of cameras to be metallic and gray, with a distinct shape, and a more noticeable lens and light.
Once the protagonist has been caught at least once, the Neighbor will start installing a lot of cameras around his house. When the protagonist walks into a camera's line of sight, it will alert the Neighbor with a loud buzz. It will continue buzzing until the player moves out of its line of sight or disables it. A camera can be disabled by throwing an item at it, though if the protagonist dismantles it, the Neighbor will fix it if they hide after being seen. The cameras can also be picked up, which renders them useless, though this was not possible in the Pre-Alpha.
If the player is caught, any broken cameras will eventually be replaced. In Alpha 1, the cameras could be turned off via a red button in the CCTV room on the second floor. There was no CCTV room between Alpha 2 and Beta 2. Beta 3 added the CCTV room back, but with a different aesthetic, and the red button is replaced with a lever that points towards green for on, or red for off.
- In the Pre-Alpha, the cameras had a different detection noise. Instead of a buzz, they used a 1kHz tone.