In the facility level, run out of the bathroom and down the stairs
as fast as possible without killing anyone.
Turn around and head through the door to kill the guy holding the
keycard. I find it nice to just charge him and shoot at the same
time (how I kill most people when trying to get a cheat).
Turn around and select your remote mines. Go to the doorway and toss
one out around the corner and near the room where the security door is
activated.
It's important to detonate it before it hits the wall,
otherwise the computer (controlling the door) is toast. You
also have to run back through the door otherwise you might
get hit by the blast (or subsequent box explosions).
Conveniently, guards running towards you, running down the stairs, and guards in the room will die in the blast (if you get it correct).
I've even had it such that a guard will open the door and die in the blast (or subsequent blasts of the boxes), conveniently.
Run into the room and open the door. Then run to the opened door.
On the way, shoot at anyone who appears, but don't waste time to kill
them if they are too out of the way, just hit them so they can't hit
you.
Run straight to the next door, to the corridor where there are three
guards. This is one of those moments of truth. You will have to kill
as many as possible to minimize the damage you take. Of course if
you're really good (or lucky) I suppose you can run by all of them.
I however, find that shooting the guard on the left, then the
guard on the right, then the guard in the center works best.
Run to your left and kill anyone in your way, don't stop to make sure
they're dead, just run as fast as possible and shoot against the far
window. A guard should open the door for you (conveniently).
As you enter the hallway where there are 3 labs, run all the way to
end, where there's a pillar and two guards standing in the corner. Go
and kill them. Sometimes if Dr. Doak is nearby, he'll run towards you.
I've met him here several times.
Otherwise, run into the lab where the
door is facing you, if there aren't 3 scientists, go press start and
abort your mission. Sorry, but you'll just have to do it all over
again.
If he is there, run to him and as soon as you say, "Time to leave Dr. Doak." run out and down the corridor to the bottling chamber. Kill the guards along the way etc...
When you see the door to the bottling chamber, hit start and select
the decoder. Trigger it against the door, you'll hear this clicking
noise if done right. Switch to your gun. This is a good time to turn
around and check to see if anyone's behind you (ie - anyone you didn't
kill on your run here).
Run into the chamber, run into 006 and start placing mines. You can
destroy all the tanks with 3 mines, by placing a mine in between 4
bottles (on the floor).
Before detonating your mines, you have to make sure 006 is out of the
way. Storytime: I've finished this mission at times of 1:48 and the
like, only to realize after the mission is over that I killed 006 in
the blast. Stupid 006, why doesn't he run away? Or kill any
guards that are after me?! Well, whatever he was a backstabber from
the start.
Run out the door, and hopefully, hopefully (with your heart beating
wildly and hands clenched in anxiety, you'll see those red letters
saying, "New Cheat Available!"
