Objectives:

Talk to Barnes

Find Video Freezer

Find Facemaker

Find Dartgun

Sabotage Video Link

Find Exit Passcard

Get Transfer Order

Escape with Candice

Impossible:

Distract Guard
                    Recover NOC List: K.G.B. HQ

                  From the start, take a left and go to the door down
                  the hall. Barnes is inside, talk to him. Go out the
                  door and take a left. Enter the room on the right, and
                  you'll find a beeper inside. Go out the door and
                  continue down the hall. Place the beeper around the
                  corner from the guard. When he's distracted, enter
                  the closet and get the Face Maker.

                  Retrace your steps to the with the camera over it.
                  Talk to the guard, then enter. The Dart Gun is on the
                  desk. Shoot the Ambassador and hide his body. Use
                  the Face Maker on him. Go out the hall and head
                  straight. Go through the door on the right. Talk to the
                  guard, then take the video freezer on the desk.

                  Go back to the Ambassador's office and go to the
                  bookshelf on the left. There is a switch that will
                  move the framed picture, revealing another switch.
                  Push that and turn around. A secret door will open
                  on the other bookshelf. Go in, kill the guards, use the
                  video freezer and grab the exit card on the desk.

                  The transfer order should be in by now. Go back to
                  the room where you got the beeper and talk to the
                  man. Go back to the room where the video freezer
                  was and hand the guard the transfer order. Talk to
                  Candice, and go back towards the beginning. Go to
                  the door with the card slot, and exit.

                  Tips: You don't even need to use the beeper on
                  Impossible. Just kill the Ambassador first, then run
                  back to the closet. The guard will be gone. You'll
                  take a couple hits along the way, but it saves some
                  time. Also, kill the guards quickly in the survellance
                  room, or they'll set the alarm.