Prep Lab 2

Move down the hallway and go through the door.  Here you'll have to face two large things and some smaller ones.  Take out the one that spawns smaller things first.  Once you dispatch them, load up on medical kits from the dispenser and grab the blood test.

Exit through the door on the left and you will find Price who will tell you that there are men who need rescuing.  With Price in tow, head back to the first room and then open the door on the right for a nice supply stash.  Proceed until you find a staircase and then head down.

You'll soon reach a computer, a save point, and more door switches.  Open the doors in this sequence: 9, 8, 6, 3, 2.  If the doors release things, go and kill them and then return to the controls.  After you open the last door, go down the stairs and make your way to Faraday.

Once you reach Faraday, lead him back to the camera station watching for numerous thing attacks.  Take him up the stairs and through the door where you'll find a few things.  After you beat them, exit the room and return to Prep.  There will be a thing and some tentacles there, so be ready.  After the battle, exit the room to exit the level.