I'm not sure specifically as there could be many interpretations of a 'heathen game story'. It might be a story related to pagan or non - mainstream religious elements in a game.
A 'heathen graphic novel' is likely to be a graphic novel centered around heathen concepts. Heathen here might refer to pre - Christian or non - Christian religious ideas. In such a novel, the art and story would work together to present things like heathen rituals, the social structure within heathen communities, and their relationship with nature. The graphic format allows for a vivid portrayal of these elements, from the elaborate costumes in heathen ceremonies to the landscapes that are important to their beliefs.
The 'american heathen graphic novel' could potentially deal with characters or stories that go against the traditional norms in American society. It may explore themes like rebellion, different belief systems, or the darker side of American culture through its graphic novel form. Maybe it has a set of complex characters who are considered 'heathens' in the eyes of the more conservative part of society, and the story unfolds their experiences and struggles.
I don't really know if it's popular. It could be a niche game that only a certain group of gamers are aware of, or it could be a relatively unknown indie game.
I don't think there is an actual game named 'Game Stop The Last Story'. It could be a creative name someone made up, but it doesn't seem to be a recognized game title.