Dead Island: Riptide Definitive Edition

A rather time-consuming one. Probably best to do early on where there are very few special infected. I often found I would get better damage or critical hit chance on a downed zombie so I recommend knocking them down first and throwing any weapon at them that way.

This will also make it near impossible to lose your weapon (should it be your favourite).
Suiciders and Infected are prime targets as they can be killed in one hit.

I tried out Logan's Fury attack for this but it does not count towards the achievement.

If you are fine with dupe glitch you can do this easily within few minutes. You can also duplicate any other weapons this way. For throwable knives it will give you infinite throws. This can be done as soon as you arrive in the first camp after prologue you can also buy there throwable knives after zombie horde attack.

1) You must have full inventory with weapons (in my case 18/18) and full weapon wheel
2) Equip fists
3) Drop anything you want to duplicate on the ground
4) Press and HOLD untill it's equipped
5) Go to storage place the item there and take it back
6) Profit

Don't change weapons, pick up back throwns or open weapon wheel. It may cancel this.