2.1 – START
Walk to the shack directly in front of you. After the cutscene, go out the door the Trooper came through and sprint to the four barrels behind the sign with a face on it.
Take cover behind them and wait for the four Troopers to come through the windows. Take them out and go into the pub. Two more Troopers will come from around the far left corner. Kill them and go up the stairs. Go through the closed door to the encounter in the alleyway.
Four or five Troopers will be waiting for you outside in the alley. After killing them, you’ll get the Steal ability.
The first thing you have to steal is a C4 Explosive placed on a tall scaffolding at the end of the street on the left. Aim at the C4 until the reticle changes shape and a orange glow appears on the C4. Throw the Glaive at it to steal it. Take the C4 and place it on the door across the alley from the scaffolding. After it explodes, go inside and follow the hallway to the room on the right. Go into the room and walk over the broken boards.
2.2 – MARKET
You’ll see a Trooper down the hall stalking the door leading to the room you’re in. When he bursts through the door, kill him. Now go out into the hall and turn left. A Trooper will be waiting at the other end of the hall. Kill him, follow the hall to the right and go through the hole in the wall. Go into the office, out the door and down the stairs into the warehouse.
Walk to the large opening in the front of the warehouse. Five Troopers will disembark from a helicopter. Take cover behind the boxes and take these Troopers out before they can kill you. They will throw Enferon grenades at you, so be prepared to move away quickly. The gas will hinders your vision. After killing them, go towards the windows to your left. Another wave of Troopers will run out from the left. Kill a few of these, and eventually the Colossus will jump down into the courtyard.
The Troopers will attack the Colossus. If the Colossus spots you, it will charge at you and break through the walls of the warehouse.
Once it creates a hole in the warehouse wall, run out into the courtyard. If the Colossus throws a rock at you, dodge roll. When it charges you, dodge roll to the side of it. The Troopers will focus their attention on the Colossus. After several minutes a shockwave will disrupt the Colossus and it will run away. If there are still Troopers left alive, kill them and walk over to the raised bridge.
You’ll see a flashing red light on the far side of the canal. Aim at it and the Glaive will lock on to it as if to Steal it. Throw the Glaive and walk across the bridge. Turn right and go through the double doors. Turn left in this room and walk to the metal grate on the floor. Shoot the lock off of the grate and open it.