DRAGON QUEST XI S: Echoes of an Elusive Age - Definitive Edition

I got this in act 1. The conveyerbelt area in Tockington was difficult to navigate. But if you're in a hurry, to can easily get this achievement in Tockington or the open sea. You can also get it through natural gameplay.

If you press , click on Misc., and then Info, you can view how many monsters you've defeated on the right side of the screen.

Very Straight forward, doesn't need to be different types just kill 1000 monsters, it naturally will happen through out the gameplay