You begin the mission pinned down in a flooded tunnel of some sort. You have two CLAWs under your control, but you are only able to give orders to the one. You can paint an area and when you press fire button, the CLAW will fire some explosives at that spot. You can also unlock a flamethrower attachment on the other CLAW.
Keep going forward, painting areas and having the CLAW fire, while you lay down some of your own fire on any enemies. It might be best to stick on the left side of the area, as a helicopter drone will fire into the area, knocking down some debris from the ceiling, which can hurt very bad. Once you get to the open area, get back when Harper says so, then continue.
Once you're outside, head to the left and use the Access point to open up a door that allows the CLAWs to continue on the mission. Press forward, painting targets and firing your own weapons at the enemies that appear, some of which will be on the balconies. Once you make it through a small tunnel, you'll be without the CLAW support.
Keep pressing forward and once all of the enemies are out of the way, run forward and immediately go to your left to the iron gate. You will have to mash the onscreen button to open the gate before the bus smashes you. This next part requires no fighting, but requires quick actions and some degree of stealth.
After you walk through the small alley with some civilians (Intel in the alley to the right), you'll come back to the streets and a drone flying around. You need to get through this next section without being spotted by the drones; if you do, you will be shot to death. When you're ready, hop over the sandbags and listen carefully to Harper. When he tells you to hide, you better hide and when he says run, you better run.
Hide twice and you'll go through a building. The next time you run, another drone will appear, so make sure you hide well (behind pillar along wall works). Keep doing this until you get inside the building at the end (Intel in the debris). Follow Harper, who will eventually lead you through the sewers, which has no fighting. Once you reach the ladder, you'll view a short scene.
SPYING ON MENENDEZ
After the scene is over, hold the designated button and aim at the spot. Let go of the button and you'll zip up onto the roof. There will be two guards ahead, which you will need to kill silently. Crouch and wait until Harper gets on the other side of the small roof, then sneak behind the enemy and press the melee button.
You will activate a scanner and you will need to locate Menendez. Zoom in and look for two people talking together, which will be Menendez. Keep the scanner on him and you will notice a counter going up; you will gain more intel and this is one of the Challenges for this mission (you need 400TB).
Eventually, Menendez will move out of range, so follow Harper to the next section. Wait until the spotlight moves out of the way, then go forward and drop down to the next area. Go prone and follow Menendez with the scanner, who will walk in from the right side of the screen.
When he gets out of range again, follow Harper as you climb up to the next section. Approach the door and Harper will sneak up behind the guard sitting down, killing him. Use your scanner to keep track of Menendez, who will come from the right again, then stop and speak with the man in the middle. Once he's out of range again, follow Harper to the next section, where you need to hide from the drone before continuing.
Keep following Harper until you eventually come to a bridge of sorts overlooked a vehicle with a guy in the back. When you're ready, hop over the railing and you'll land behind the guy. Press the melee button to get rid of him, while Harper will kill the driver. Follow him once again inside and you'll come to the last scanning section of the mission. Once it's over, follow Harper through an underwater section, where you will resurface and get caught by Menendez.
ESCAPING
Now that you've been found out, you have to escape. Follow Harper through the waters, then through a small hallway and into a garage, killing anyone in your way. When you come to a door, Harper says to switch to the CLAWs to help aid in your escape. Switch to the first and kill all of the enemies there, switching to the second when you can to clear the outside area. Keep doing this until Harper decides to make a run for it.
When you're outside, run to the vehicles and you'll automatically get inside. After a short scene, you'll be in control of one of the drones. Use your minigun and missiles to clear the soldiers and the gate blocking the way. You will now be in control of the vehicle, so accelerate and start driving.
This section can be pretty hectic, as there are plenty of distractions in the form of vehicles and other enemies. When you're told to boost, do so and you will jump off a ramp, which will trigger a choice to stay with the driving part, or switch to the drone again. Whichever you choose, you stick with it until the end, so keep on driving or destroying anything that gets in your way. Drive under the flames, then get out and to the extraction point to finish the mission.
