Exit through the vent into the alley. You will see a group of chots waiting there. To your left is a metal ramp, leading over into an area occupied by light cops. There is no way to win this battle - cops and chots will continue returning to replace their fallen comrades, so you'll just have get out of this area as quickly as you can.

Run up the ramp to get the cops firing at you, then run back. The cops will follow you, and the fighting will commence. Possess a cop and run over the ramp. Run to your left. You'll see a console behind a glass barrier. Shoot the barrier and activate the console. This will remove the laser wall at the opposite side of the alley.

Run back up the ramp and down the alley. Whether you are in a cop or a chot, you most likely must do some fighting at the opposite end. Once the coast is clear, run up the stairs behind the now-deactivated laser wall. At the top is a plasma barrier to the right and a detonator on a crate to the left. Activate the detonator and run for cover.

When the crate explodes, it should destroy the glass window above the plasma barrier. If it doesn't, you must climb the barrels and shoot the window. Jump through the window into the control room - a pak will be useful to make the jump.

You're now in a room with a stack of crates and some consoles. Only a commander can activate the consoles, so ignore them for now. Shoot the stack of crates - the explosion will destroy the grate blocking a vent near the ceiling. Drop your weapon, then climb the crates and go through the vent.

You'll emerge on a high rafter. Below you, you'll see a ledge next to some windows. Depossess your host and glide down to the ledge.

Through one of the windows, you'll see a commander taking a shower. Wait until she is finished, at which point she will open the other window. Fly through the window and possess her. Leave the room through the unlocked door. You'll see a few other commanders standing around. Go through the opposite door and up the stairs.

You're now back in the room with the consoles. Activate either one to access the offensive bot. Walk near the bot to activate it. Go back down the stairs, across the commander room, and up the other staircase. Open the door and get ready to fight some chots.

A few chots will begin heading down the street toward you. You and the bot should deal with them easily. Don't forget that the commander carries distortion grenades, which can buy you some time in a heavy firefight.

Once the chots are out of your way, go through the large door at the end of the street. You'll emerge on a large, outdoor dais. In the center is a turret console. Activate it. At this point, you'll be confronted. The ships flying around aren't your problem - you must deal with the manned turrets on the building opposite. Unfortunately, they are shielded, so you can't directly damage them.

The control room has some weapons dispensers, a console near the barrier, and a console in the back room. Activate the latter console to restore power to the lift in the center of the alley. Use the weapons dispensers to get yourself a bazooka or other heavy armament - it will be helpful in the next area.

Use the console near the plasma barrier to disable it, then run back into the alley. The lift is near the vent you came through when you entered this sector. Get on the lift and ride it up. Go through the door.

Instead, aim at the supports beneath the platforms. Destroying these will cause the turret platforms to crumble away. Once they are gone, the plasma barrier to the next section will be removed. Deactivate the turret, then go through the door into the next room.

The next room is occupied by a medium cop and a heavy cop. Attack them - they'll only cause you trouble. There are also some ammo boxes and grenades lying around and another offensive bot in the truck. You must destroy the crates to get to the bot. Pick up what you need, then activate the console to unlock the door.

Open the door. There are some chots waiting in ambush in this alley. It is highly recommended that you take this opportunity to possess one - it will make the next area much easier. After the battle is over, shoot the crates to destroy the rubbish blocking the gate. Open the gate and go through.

If you have possessed a chot, you can just stroll through this area with no conflict. If you haven't, you have a tough fire fight ahead. There's a few chots with bazookas in strategic locations as well as a few in shielded posts. If you must fight, take cover behind the stack of crates near the door and snipe those chots you can hit from there. You'll have an easier time with the remaining ones if you jump up the crates and onto the walkway that runs along the top of the area.

Once the area is safe, proceed to the gate on the opposite wall and go through.

You'll emerge on a street occupied by chots. A few straggling policemen will wander in occasionally through the large door. You'll need to possess one of these. If the chots prove overwhelming, keep possessing them until they wipe each other out. Make sure they see you when possessing them - you'll stay safe until the body dies, and then you can quickly possess another one. Once the chot threat is gone, possess a cop and step on the security scanner.

This scanner will open the door and let you into the compound. In the compound, follow the walkway to the elevator. Get in and activate it. Unfortunately, it will break down during its ascent. You must get a repairman.

You'll have to time this part well, or the patrolling cops will open fire. Use the zoom mode to watch the cops' patrol routes before jumping down and possessing the worker next to the elevator. Once the coast is clear, and you're safely in the repairman (there's another at the far end of the walkway, just in case the nearer one gets killed), drop into the space below the elevator. Use the gears to fix the elevator, then climb up and back into the elevator. Resume your trip up.

You'll come out in a room patrolled by some medium cops. Watch their patrol routes and possess one when it's safe. There's a large door to the left and a hallway to the right. Go through the door. Once again, the chots and the police will be fighting. Possess the light cop with the bazooka on the walkway, then head back into the compound.

Go down the hallway. You'll see an area blocked by a laser barrier. Shoot the control panel on the wall to deactivate the barrier. Unfortunately, you can't go any further until you restore power. You must get to the sewers. Turn around and go down the steps into the tank bay, then go through the door into the war-torn streets.