It is not a traditional "room" or "building", but an abnormal phenomenon called "haunted house coding". The victim will be randomly drawn into an "endless corridor" connected by countless "haunted house units" full of malice, weird rules, and time and space distortion. Each "haunted house unit" is an independent horror experience, which may originate from a coded copy of a real place where a tragedy occurred, or it may be a creation of purely malicious imagination. Survivors need to find "security protocol loopholes" or complete "purification tasks" in extreme terror in order to temporarily leave the current unit and enter the next one. There is no end, only despair and struggle.
