Penumbra: Black Plague Discussion
Go into the first door ahead, an infected will chase you around the room, on the right side corner of the room there's a switch and valve, spin the valve and distract the infected until she's under the box and pull the lever, the box will fall and kill it. Grab the key and use it on the locked room, use the computer and unlock the chemical room airlock. Head to the chemical room.
Did you do this in the research room?
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