Pure Evil Villains who are Game Changers. These villains are responsible to altering the tone of the story by their actions. These villains often appear in light-hearted stories. They are known to be unheard of in the story they appear in. For example, a serial killer appearing in a children's show. When these villains appear, they are presented very seriously, and taken completely seriously, dramatic, dark, and edgy and are not portrayed comically.

While all Pure Evil Villains are taken seriously in the works they appear in, this category is exclusive to Pure Evil Villains who are contrasting to the light-hearted tone of a work. The introduction of the Game Changer, shifts the tone of the story that was light-hearted to something very serious. This category does not include Pure Evil Villains who appear in stories that already establish a serious tone, even including comedies that were already established to be dark in nature even before the villain appears, and also does not include villains too Laughably Evil to the point where their presence does not clash with their tone.

They are not just the opposites of Laughably Evil but also the complete opposite of Comic Reliefs and Pure Evil counterpart of Seriously Good. Prime examples of this category are Judge Claude Frollo, the Singularity, Isaac Ray Peram Westcott, The Lich, Agatha Trunchbull, Slade, Lotso, Victor Krane, Princess Shroob, Lord Commander, Novisor, Trigon, and Dick Hardly.