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In rooms 610-617, there is another GL Labs area which looks modern, albeit chronologically older, equipped with newer technology such as ventilation and holographic screen for vertical doors (akin to some of the ones in the 'Alien' series), which notably reset if disregarded for too long.
As the player advances throughout the facility, they will find some notes in the form of holograms written by a former GL Labs' Assistant who has been assigned to retrieve some "things" (most likely a Specimen, at the request of Spooky) with the members of his team as a company. The notes reveal that the old lab was most likely constructed with a much larger budget, but done carelessly, as some of the equipment is barely functional. The power still has the potential to work, but will go out for a short while even after a generator is activated (as the player will find out briefly). Finally, the fate of the note's author is revealed as it stated "him/her hiding from that thing... can't think well... feel something growing on his/her skin... losing a lot of blood."
The lab seems to have no power, and the player must interact with spare generators found in various locations to get the doors and lights back online to progress. The player ends up travelling around until they get to room 614, where the power runs out, and to continue, they must travel through the ventilation system. After entering and exiting numerous maze-like air ducts, the Player will find themselves in room 617, where there is a generator to the left of the room, and a note in the middle of a blood puddle. Using the generator will spawn the old Specimen 10, which is, in fact, the host for new Specimen 10. The parasite will erupt from the old one's head and start chasing the player for the first time.