Game of Champions is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading Game of Champions chapters on ManhwaZ, fastest updating comic site. The Summary is
The battle between the Demon King and the Hero … The world 100 years after the “Holy War”. While enjoying the peace created by our predecessors, we still couldn’t stop fighting.