Assassin's Creed Unity, like all Assassin's Creed games, takes place during a bloody chapter in world history. Developer Ubisoft, however, is pulling all the stops on the bloodiness. The French Revolution was very excited about removing people's heads from their bodies, and Unity is exploiting a bit of the ol' ultra violence.
Enter Rob Zombie, musician and horror movie director, retelling Unity's premise. Also, enter Peter Moore, illustrator from The Walking Dead graphic novels. Put those two together, and you've got this video. It's not squeamish about the grizzlier details that go into literally cutting off the head of government.