King's Ransom Walkthrough
Radical terrorists have decided to make an attack on Mi6 HQ.  In the middle of all the chaos, you must find and rescue Sir Robert King.
You will start out getting orders from M.  Turn around, and go into the next room.  Talk to Moneypenny, and you will receive a Pen Grenade.  Then exit the offices.
Turn to your left, and a guy will break through the window.  All you have to do is hit him with your stunner a few times, and then the security guards will finish him off.
Turn around, and take the first left.  It will look like this.  Go right at the intersection.
That spot will look like this.  Keep going, taking a left.
At the end of the hall, there is a security office.  Activate the hand scanner, and go inside.
Go to this control panel, and hit B.  It will initiate the lock down, keeping any more terrorists from coming through the windows.
If you are playing on Secret or 00Agent, at this time Moneypenny will tell you that the terrorists have captured M.  You will have to go back to that first room and save her.
When you get there, there will be a single terrorists holding M at gunpoint.  Shoot him, and M is saved.
After you are done at the security center, follow the hallway back to here.
Go foreword, then left, then right, until you get to here.  There will be some armor in that room on the right.
Continue through the door, and look out for the terrorists in the ropes.
Fight your way to the bottom, and then you get to watch a brief cut scene.  Shoot the guys coming down.  It only takes a single shot to knock them off.
Follow the hallway until you get to this room.  There won't be anywhere else to go but to here.
Go straight through to this point.
Turn right, and go to this panel.  Activate it, and objective G is completed.
Exit that room, and go straight down the hall until you get to here.
Like before, activate the hand scanner, and activate the security lock down for the ground floor.
Exit the security room and go left.  Then turn right, and right again so that you end up here.
Turn left, and just keep going through the hall until you arrive here.
Activate the hand scanner life the other times.  And go through the door, into the vault.
On Secret and 00Agent, this guy will tell you that the people need medical attention.  If you are only on Agent, skip this part.
Exit the vault, and go back to this point.
The small hallway will look like this once you turn down it.
Talk to the doctor.  YOu will then have to protect her while you both make your way back to the vault.
She will go and help this guy here, which will complete Objective I.
Advance into the vault.  When you get near King, you will see the cut scene.  After that, Q will tell you get get to the Q labs quickly.
Advance down the hall to this sign on the wall.
 
Turn left, and go to this sign.
Keep going, and turn right, so that you are facing this thing.
Turn right at this spot, and you will see your destination.  You then get to view an awesome cut scene of the boat chase.