You start at the top. Algol live at the bottom of this area, whilst you are near the catwalk, this makes it harder for them to attack. A small lift is used to get to the middle area.
You reach this area via lift. Caren is located in this area. The door to the Lobby is in this area. To get to the ottom, you must fall down an opening.
You get here via an opening. The floor is mostly glass due to Formation Changes.