The objective of the game is to protect the tenants of the Edward Arms. The player character never actually enters the building, and must protect the tenants using the surveillance cameras, sensors, and traps installed in eight of the rooms. Using the cameras, the player may view any of the rooms, but can only view one room at a time, as with "Night Trap". However, unlike "Night Trap", at all times a mini map shows the player whether tenants, intruders, or both are present in each room, and an alarm sounds when an intruder enters any room. In addition, many of the intruders' appearances occur at random. Success in the game thus depends on quickly and effectively responding to situations rather than on determining when and where enemies appear.