Portal: Catalyst
PuzzleCaught in the crossfire of Portal's ending, return to the ever-expanding and changing Aperture facility from a brand-new perspective of a new Test Subject...
after 20 years in stasis, you awake to find out that the facility of h2f laboratories, the brother company of aperture science, has been abandoned for almost as long as you have been asleep, and the only voice you hear is an un-familiar one, not quite human, yet not quite machine. you are test subject 865, and it is time for the test you signed up for, to forward the technological advancement of the united states.
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