Keep moving through the corridors, you can only go one way since most of the exits are blocked. You’ll see all sorts of horrors, like decapitated soldiers and runes written in blood; eventually you’ll encounter similar monsters as the ‘nightmares’ in the first game. Move through the surgery room (marked recovery) until you come up to the washing room: it seems like a soldier’s head is up for the rinse-cycle. Head left and move through this floor, you’ll encounter more ops and you should be familiar with this floor since you have already been on it.
After taking out a number of soldiers, some of them already injured, head towards a pillar with a marked ‘X’ (there is a medi-kit through the double-door). Now you’ll see a trail of blood which you will need to follow; as you come to a double-door turn right to the staff-only room where more massacres have taken place. Keep moving ahead and go through a small door. Move ahead still, you’ll see a soldier getting ripped apart by one of the creatures. Further ahead you’ll see more trails of blood and you’ll come to more stairs; take the staircase down, head left and left again through the double-door. Take out more ops and move through the corridor, then turn left and head for what is marked as the exit of the complex; now turn left again through the door, head for the lift and activate it.
Now you’ll come to some kind of operating theatre, or at least what remains of it. A video-sequence will play: wait until it’s over and you’ll meet some of those ‘nightmare’ creatures. I suggest you use slow-motion to kill them off as they are quite quick; not necessarily tough but move at great speeds and will try to knock you down.
Head out of the room once you’re ok, and you’ll see your buddy Jankoswki being taken apart. Unfortunately there is little to do here, look for a vent and end this chapter