Dead Island 2

ENGLISH: The easiest way I found is outside Blue Crab Grill in Venice Beach. Try to attract more than 5 zombies on either side of the metal fence.

You can shoot through the fence and the zombies can't move because they are hitting the fence. Now, the shooting sequence is simpler compared to the grass in HAUS DLC. I hope this helps :)

ESPAÑOL: Existe un error de traducción en este logro, es hacerlo en sucesión RAPIDA, a base de recarga disparo. Entonces, la forma más fácil que encontré es afuera de Blue Crab Grill en Venice Beach. Intenta atraer a más de 5 zombies en cualquier lado de la valla metálica.

Puedes disparar a través de la valla y los zombies no pueden moverse porque están golpeando la valla. Ahora, la sucesión de disparos es más sencilla a comparación del césped en HAUS DLC. Espero que esto ayude :)

You will gain access to the crossbow for the first time during the HAUS DLC after accessing The Well, So just play the main story of the DLC until you get the item. After this you will be tasked to escape The Deeper which you've done before but on your way out just before leaving there is a room you can unlock with the crossbow by shooting 2 brains on the wall it's pretty hard to miss and you likely came across it when you entered The Deeper the first time around (you know its the right place if there is graffiti on the wall of a man being electrocuted). Inside here will be a higher quality crossbow which has the ability to apply 2 mod slots instead of one. This will make the achievement significantly easier. Now head to the workbench just outside this room and apply both available RELOAD SPEED mods to your new crossbow, they are called SPEEDLOADER and TACTICAL RELOAD. This should make the process of popping this achievement trivial as soon as you reach the tall grass area soon after leaving you can even afford to miss a shot and still pop the achievement. Lastly if you for some reason weren't able to find the higher quality bow I'm sure you can still manage this pretty easily with only the SPEEDLOADER mod equip. Also I found it easier to scope in personally, just make sure your aim down sight sensitivity is low enough.

This one is pretty simple but annoying the best way I found of doing this was in the cul de Sac area with grass as the zombies constantly spawn in that area and I took out all the runners and just left the walkers as they where a bit more easier to hit and I found it alot easier blind firing as the scope didn’t do it for me. Also you wanna make sure you progress enough in the story to get the crossbow