Dead Island 2 now has a crossbow that you can find. You need this crossbow if you want to destroy the brains in the Haus DLC. Of course, obtaining this item is easier said than done. Unfortunately, this weapon isn’t available immediately in the DLC. Instead, you need to progress a little bit first.
The crossbow in Dead Island 2 comes after you complete the Rite of Passage in the Invitation mission and have found Veronique’s head. After returning her head to her body, Veronique will tell you about the crossbow. This guide will show you how to get the Crossbow in Dead Island 2.
How to get the Crossbow in Dead Island 2
If you want to get the crossbow in Dead Island 2, you need to find Iris’ body in the forest. Once you have returned Veronique’s head, the path to the forest will open. Step inside and start your next trial.
Go through the forest until you find the doorway leading to the well. At this point, you will get the objective to light the pyres. Make your way back through the forest to locate the two pyres you passed on the way to the well room. You can lure the flaming zombies into the pyres to light them or simply toss Molotovs at them.

With both Pyres lit, you will get tasked with maiming zombies in the arena. Locate the arena in the forest and continue to maim zombies. This is done by breaking their limbs. Once all the limbs have been maimed, you will gain access to the well room. Head back to the well and interact with it. This will get you a cutscene where you jump down the well.

When you hit the bottom of the well, you should see the crossbow resting on a body. You can now pick up the crossbow and use it on the brains. Once you have the weapon equipped, simply shoot a brain with it to destroy it. Make sure you also know how to craft Crossbow Bolts in Dead Island 2.