Yu-Gi-Oh! is a 1998 Japanese anime television series produced by Toei Animation, based on the manga series of the same name written and illustrated by Kazuki Takahashi. It is the first animated adaptation of the manga and was directed by Hiroyuki Kakudō. Like the manga, this series is centered on Yugi Mutou, who becomes host to an ancient gambling spirit after solving the Millennium Puzzle. This series loosely adapts the first 59 chapters of the manga while adding several original events and characters; fans commonly refer to it as "Season 0" to distinguish it from the later Yu-Gi-Oh! Duel Monsters.

The series was broadcast on TV Asahi from April 4, 1998 to October 10, 1998 and was followed by a theatrical short film released on March 6, 1999. The opening theme is "A Dry Yell" (渇いた叫び, Kawaita Sakebi) by FIELD OF VIEW while the ending theme is "Even If You Were to Break Tomorrow" (明日もし君が壊れても, Ashita Moshi Kimi ga Kowaretemo) by WANDS.