The world of trading card​ games (TCGs) is vast and diverse, encompassing a wide array of themes, mechanics, and communities. From humble beginnings rooted in baseball cards to the complex and strategic gameplay of modern TCGs, the genre has evolved into a global phenomenon, captivating millions of players of all ages[2][8]. Determining the "most popular" TCG is not a straightforward task, as popularity can be measured in various ways, including sales figures, player base size, tournament attendance, and online presence[3][6]. Nevertheless, by examining the historical context, key players, and current trends, we can gain a comprehensive understanding of the TCG landscape and identify the leading contenders for the title of most popular trading card game.