Yakuza: Dead Souls

Hermits are big, heavily armored zombie mutants that look like a round clump of stone. You first encounter them in Part III, Chapter 2 where you will probably earn your trophy here any way.

Shooting them with a gun will eventually break its stone armor shell, and you want to avoid that. Fire at gas cylinders/barrels while the Hermit is near one, lure them to roll over flammable objects or throw Incendiary Grenades/Molotov Cocktails at the Hermit until it dies. You may also use any Flamethrowers that you find which is the most effective way to killing a Hermit.