The manga series has spawned a media franchise that includes multiple spin-off manga and anime series, a trading card game, and numerous video games. "Game King" is a Japanese manga series written and illustrated by Kazuki Takahashi.
See also: Yu-Gi-Oh! GX, List of Yu-Gi-Oh! video games, Yu-Gi-Oh! Sevens, Yu-Gi-Oh! Duel Monsters, Yu-Gi-Oh! Zexal, and Yu-Gi-Oh! Trading Card Game.