Dead Island: Riptide Definitive Edition

The way I did it was very simple. You can do it as early as chapter 2 or as late as chapter 12. All you need to do it bring a few mines to a deadzone area Easiest one is the one nearest paradise camp and kill of the deadzone boss. after that when you have a full rage bar run back in, and gather everyone near the fences and kill them all. Kick their bodies together, then ram open a side door and bring a zombie in. when they follow you, you must place a mine in the dead bodies and run to the other side and let them step on it. If you accumulated enough dead bodies, the achievement will unlock.

This is my 101 solution and the first one that I write after a long time...

I tried to unlock this in different parts of the game playing solo, but gathering around 10 zombies isn't as easy as in the first game and when I finally managed to do so they wouldn't die all 10 from the blast. So, the solution above helped me figuring out what to do, but hopefully I can be better at explaining it.

During chapter 12, in the city of Henderson, following the Main Questline, you'll get access to a previously locked area in that city. In front of its entrance there's a "bulldozer" (a yellow tractor). BEFORE using the tractor to blow up the gate, kill the enemies outside the gate so you won't be unexpectedly bothered. Then, with a gun of your preference (I did it with the sidegun/pistol, but the sniper or a 1 shot rifle could work too) approach the gate by the left or the right side to cluster the enemies and start doing headshots at them. That will attract more zombies from inside the gate, but none of them can reach you to hurt you.

Kill all of them except for 1 by the gate. Then, drop an explosive mine as close as this enemy and the gate as possible. Run away. The achievement should unlock like it did for me. IF you mess up, go to the menu, press Y to quit the game and then reload it again.

In other words, although the description says to kill 10 monsters with one mine, you only really need 1 of them dying and 9 other corpses blowing up during the blast. I guess the lesson here is that a zombie is never truly dead unless if blown to pieces.

If this method works for you as well, leave this solution a thumbs up to let me know. Thanks!

Following on from the other guides, and using the same method a place I found is in the side missing the dead can't dance in Henderson. Once you enter the cafe to turn the music off an alarm will start. Stand in the doorway and the infected constantly spawn you can easily like up bodies here and then set a mine for the achievement, before going and turning the alarm off.