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.
Create randomized "glitch spots" in the walls that require a specific sequence of actions to trigger, acting as a shortcut or an alternate ending path. Entity & Interaction Features Inside.the.Backrooms.v0.1.9a.rar
Add a "Weight" or "Noise" mechanic where carrying too many items (like extra Almond Water or heavy Radios) makes the player move slower or produce more noise, alerting nearby entities. New Level & Environmental Features Introduce subtle environmental changes (e