First thing in this level you get to start out getting shot. MC one of the guards across the bridge and use him to kill the other guards. After all the guards are dead take one of the pieces of bridge that broke of and stand on it. Now TK the bridge piece and float over the broken area of the bridge. Proceed to the door at the far and go through.

In this next room there will be an electrified floor. You have two options TK the guards onto the floor which will make the floor no longer electrified or MC a guard and make him walk onto to it himself.

After you do this with three guards all the electric plates will be shorted out and you can safely walk across. Go on to the next room.

Go up this ladder and into the door at the top level.

Time for the particle accelerator. In the first room you will find a medical guard and a normal guard. Kill them however you want then find the switch in the room. It is to the left of the door you will be exiting the room from. Flip the switch and get ready to run. To make it through the accelerator you will need to run to the small safety areas on the side of the tunnel. Run from the room and into the safety area and then to the next room. You will need to do this for all the rooms. Go right when you are moving to the next room (same direction the particles and being accelerated). Move onto the next room and kill all the guards in the room then flip switch. You will need to flip all four switches in the four rooms to turn off the accelerator.

After you turn off the accelerator go to room K3 (Green letters) and go through the door inside the room to get to the next area. After you go through room K3 go up the ladder.

In this room you will noticed the conveyor belt leading off to the next room. You will need to go into the room upstairs and press the blinking red button to open the chamber and release the explosives onto the conveyor belt.

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After you see he green explosives go into the next room you should also proceed to the next room. Kill all guards necessary in this room. To move on take one of the green explosives and throw it against the fence. The part of the fence you should throw it into will be on the far left of the area you can walk on. After you break the fence you will get a lot of guards coming after you so kill them a few of them are mp3 guard so have fun.

After you've killed enough guards find the room with the 3 switches and the blinking red button. Ignore all these switches and the button and move onto the next room.

Run about halfway down the hallway after you go through the door in the last room.

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Kill all the guards that come into the room I recommend using PK on one guard then throw him in the corner and just throw all the other guards on top of him ... make a human bonfire. Make sure you grab the keycard in this room before you move on. Leave this room and go through the door to your right when you exit.

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After the cutscene kill the 2 human torch guards then turn around and go down the hallway. A little ways down the hallway there will be a sentry gun. Use whatever means you need to get past it then go through the door it's guarding. In this next room kill the mp3 guards and then you will need to stack boxes to climb over the wall into the next room. Grab the keycard in this room then leave and go back to the door you were facing after the last cutscene (Door with the camera over it). The guard in this room will drop a elevator keycard grab it and head to the elevator in the hallway.

Take the elevator up to floor 99.

After you get off the elevator you will see a blast door down the stairs in front of you. This door leads to the next boss Marlena.

MAKE SURE YOU MAKE A SAVE BEFORE YOU GO INTO THIS BOSS FIGHT.

*Explanation for saving*

There is a glitch in the game that prevents you from being able to beat Marlena if you continue after dying. The extinguisher containers that you throw at her will be imbedded into the ground if you try and play her after you have died. You will need to reset the game and load up your nearest save if you die while fighting her.

Nicholas Horn

"Nicholas Horn has pointed .... even if u manage to defeat Marlena with the gas tanks embedded in the ground, there is another glitch. When she comes out of her barrier, she will be embedded in the ground as well. She will first do a cartwheel and then she will sink into the ground really fast where the gas tanks are. Please email me if u dont understand it."

*Boss fight*

Marlena is not all that tough you just need to dodge. Her first phase is simple she will shoot you with a beam that comes from the center of the room. To dodge this beam find the rack that the containers are on and crouch hide on the side closest to her. The beam will be about 2 inches from your head but you will be safe as long as you stay there. After she shoots you 1-3 times with the beam she will go into overload. 2 blast shields will come out of the ground when she does this hide behind them or you will get turned into blood smear on the wall. To kill her take the containers (they look like average CO2 or oxygen containers) and throw them at the gun looking thing above her.

After you make her come out of the protected area she will run around shoot assorted fire at you. Just dodge her attacks and throw more containers at her. After you hit her enough times she will die in a fiery mess.

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