Introduce subtle environmental changes (e.g., doors appearing/disappearing, wallpaper changing color) that only one player in a co-op session can see to increase paranoia.

Implement a system where entities can not only hear the player but mimic recent voice clips to lure teammates away.

Allow players to "Barricade" certain doors temporarily using found items, providing a brief window of safety from chasing entities like the Howler .

The version of Inside the Backrooms is an early legacy build. If you are looking to create or implement a new feature for this specific version, here are several gameplay ideas and mechanics based on the existing Inside the Backrooms Wiki and community feedback: Core Gameplay Mechanics

If you are developing a mod or a standalone addition, you can find more inspiration for level design and entity behavior on the Backrooms Wiki . Inside the Backrooms on Steam