I've included 3 folders of textures:

PBR: Base color, Height, Ambient Occlusion, Normal Map, Roughness

Unity5: Albedo/Smoothness, Normal Map, Ambient Occlusion

Unreal: Base color, Normal Map, Ambient Occlusion/Roughness/Metallic

The fbx which is game-ready for any engine and the blend file which includes the sculpted high poly models that I used to bake the normal maps.