Game: Wolfenstein 3D
What Makes Them Bad: Stomping around in the castle making a mess. Being Hitler.
What Makes Them Cool: It's Mecha-Hitler. Kill it with fire.

If for some reason you thought Hitler was dead (suicide, no less) then you must have never touched Wolfenstein 3D, where he makes a grand reappearance as a mech. We're not sure what this means either, but the boss battle is oh so sweet.