Chapter 5

You're now in control of Sam. Simply follow Hector and his men until you're given a gun. Head down the hall, kill the guards and continue around the corner, up the steps. Immediately get behind cover and take out the guards in the distance, then move past the corner and repeat the same tactics. You have a lot of backup support, so you should be more than fine, just remember to pick up ammunition every now and then.

In the next room with gated doors, get behind cover. After the explosion, follow Hector and his men through the alley. Head upstairs and defeat a few more guards. It's advisable to switch to the machine gun they're carrying - it grants you a lot of ammunition for an upcoming firefight in the room up ahead.

After the initial firefight here, a second batch of guards enters the room from the way you came. Defeat them and loot the place for ammo, then get behind cover. Continue down the hall after the explosion. Outside, immediately get behind cover and quickly move onward from cover to cover. The turret will destroy the concrete blocks you're hiding behind rather fast, but when you make it far enough, the turret tower is taken out automatically. After this it's only a matter of following Hector and his men.