Press the red button and enter the elevator.
Lab -- Right at the entrance to the lab, left click to examine the drain on the floor. The key is in there. Left click on the table and automatically get the magnet. In inventory, combine the magnet and the string. Use the magnet on the drain. You now have the key.
Secret Room -- Use the key on the iron cover. It opens. Left click to access the safe. You need to find the combination. In inventory, use the magnifying glass on the unopened book. Martin will remark that there is a suspicious spot. Right click on the book and go to the last page. Left click on the suspicious spot. The paper is different. Perhaps we could use some steam on it. You do have an iron in inventory but you’ll need to heat it up.
Lab -- Left click on the burner. It has no fuel. Use the can of fuel on the burner. Use the matches on the burner. Use the iron on the burner. In inventory, right click to open the journal. Go to the last page and use the iron on the bottom where it is a darker color. Some numbers appear: 47922. Examine the diagram on the wall. Left click on the mechanism to examine. Left click on the large containers to examine. Left click on the pedestal. Go back to the secret room.
Secret Room -- For the safe puzzle, the left mouse button turns the dial clockwise while the right mouse button is counter clockwise. Enter the combination as follows where C=Clockwise and CC=Counter Clockwise: C4, CC7, C9, CC2, C2. The safe will open and a statue is revealed. Left click on the statue to take it. Exit the safe. SAVE YOUR GAME NOW. Exit the secret room. The fake Stasek confronts you with a gun. You will need to act fast here b/4 he kills you. He wants the status. Give it to him. Martin will throw the statue on the hoist platform. As soon as Stasek bends down, left click the lever on the wall next to the secret room entrance. The crate above will fall down and hit Stasek.