For this Onimusha Way Of The Sword guide, I'm going to be showing you how to get the Genma Griller Trophy, by setting ablaze 3 Genma at once.
I had tried many different ways of attempting to get this trophy and nothing seemed to work, until I realized a slight difference in something I had been doing, to what actually made the trophy pop, I will explain in the guide below.
Genma Griller Trophy Guide
To begin with, you want to make sure that you have the Firebird Flute Armament, and have that fully upgraded, specifically making sure that you have the Charged Shot.
Now make your way to this location on the map, Spirit Mirror, Kamo River - East, explanation for why to come here in a moment.
From the Spirit Mirror, make your way over to the left towards the large house with a sharp stick fence all around it.
You want to head in the fence and begin combat with the Genma, but you want to lure them out of the garden area and onto the street. Now you want to charge your Firebird Flute and once the Genma are all huddled and grouped up, use your Armament ability to set the Genma ablaze.
Now as you might notice, there are different types of Genma in this fight, and after a moment, your trophy should pop, which indicated to me, that this trophy is triggered by setting ablaze 3 different types of Genma at once, that isn't confirmed, however after trying to get this trophy in other areas with 3 of the same Genma and using different ways to set them ablaze, this is the one that made the trophy pop for me.