I have the doom3 version for pc's and cannot get through the Mc-2a airlock in the maintenance building to find the scientist. I can enter the airlock, but cannot get out the other side. Have tried everything I could think of, including the 531 code, walking into the door, and trying to click all the buttons. I am using the keyboard and have a cheat book that only says "go through the air lock." Not much help. I finally gave up after a few hours. Also it says to pick up equipment and ammo from a table. I walk to the equipment and nothing happens. I even use the hands, same problem.
Thanks for the help.
Have you clicked the cycle button on the wall