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The Phobos Labs is one of the main facilities at Site 1. It houses what has been described as "many technologies". The nature of these have not been disclosed.
Sector 1 houses its own teleporter. This teleporter can take the player all the way to the Delta Complex, located above Site 3. The rest of Sector 1 contains warehouses and controls for the complex.
Sector 2 contains Site 1's two main machines; the pump station, and some colitant rods.
Sector 3 houses the main plasma reactor which powers up Site 1, as well as the life support systems.