Wait for arrival of Harlow | Chapter 3 - The Ritual DI Riptide Guide
Last update: 11 May 2016
The battle divides on three main parts. At the beginning start eliminating Walkers and Infested. If you can, stay in the middle of camp, to not get close to flames and get hurt. But you can push zombies into the fire.
As in the previous big battle with Horde, help your allies grabbed by zombies. Try also not to use all of your med-kits, because you'll need them later. First part of battle ends when two bars of Horde Strength run down.
Second phase differs from the first one, that you'll have to eliminate also a Drowner and two Thugs. But firstly focus on eliminating Walkers and Infested.
"Elite" zombies should be left for the end. Attack those already involved in fighting with your allies. It's also worth to attack them from behind, what causes bigger damage. Second phase ends when two next bars of Horde Strength run down.
Third phase of battle contains additional two Drowners and boss zombie - the one you've already maybe met during a sidequest White Line. Reminder: he is fast like Infested and tough like Thug and can also poison you. Attack him at the beginning with your best weapons.
Main battle ends when the Horde Strength bar goes down - when all zombies are dead (again). Now you have to wait for Harlow to arrive. Don't bother about more incoming Infested, because their attack will be stopped by a cut scene. After that the mission ends.
Main quest unlocked: Way of Science (quest is automatically unlocked after finishing the described mission).
Sidequest unlocked: Stop the Madness (quest is automatically unlocked after finishing the described mission).