Area 1 - Plaza

As you run across the traffic all the enemies start appearing. First from the front, then from the right, then from behind and then from the left. Use Threat Grenades to keep track of the enemies and stay crouched at all times behind the little walls. Try going for headshots which are a 1-shot kill. Don’t be afraid of using your Smart Grenades to take care of a group of these bad guys.

Area 2 - Truck Area

When the truck appears after the school, quickly enter the building on the left, crouch and take out the two tangos running on the upper balcony through the window. As you try to exit the building 2 more enemies come so kill them and quickly dash to the other building. Shoot the guy on the turret ASAP and deal with the other 2. Really simple.

Area 3 - Highway

I recommend tossing Grenades to take care of the enemies as they appear in groups. If not, use your weapon while you crouch. Kill the first batch and then take out the second batch the same exact way.