I am trying to open the gate in front of me to get the last tile. (am trying to include a screenshot of the room but it only puts the link )
For the life of me can't find what to do. Could anyone help me please?
Go out the bottom right then in that next area go in the vent in the bottom left (diagonally across from where you come out) and proceed to the lever to switch the doors for you to go to that room.
Excellent - found it...but then I ran into a problem. The other doors have closed. Is there another way into the room?
When you go through that room out the vent back to the main room, on the left wall is a vent.
Go through that to get the other lever that switches the gates the other way.