There can be multiple checkpoints in each zone, but they all function similarly. Specifically, there's one between the Light Containment Zone and Heavy Containment Zone and one between the Heavy Containment and the Entrance Zone.
The Checkpoint Rooms are rooms that separate each zone in the facility. Light Containment Zone Main article: Light Containment Zone Heavy Containment Zone Main article: Heavy Containment Zone Entrance Zone Main article: Entrance Zone Checkpoint Rooms
