These three undead skeleton fit on your game or prototyping your game, hack and slash, horror, shooter, you named it. All files created in 3ds Max and rigged, unwrapped, textured (2048 x 2048).
Three models are : Naked undead with jaws, naked undead with no jaws, armored undead.
Please note : All texture models only available in complete map, rendered (baked) in Substance Painter. All models fit on Unreal Engine 4 mannequin skeleton so you don't have to retagret again in Unreal.Best for your Unreal Project, but if you using other than that, I think you need to modify the skeleton on retarget on your engine.
Files including 3ds Max 2016, FBX rigged and Unreal Engine Files for testing.
Fully tested as my prototyping combat system : https://www.youtube.com/watch?v=zeGBzVgS8Qc&t=17s
All three models separated 3ds Max file