遊☆戯☆王 (Yu-Gi-Oh!, King of games) is a manga series by 高橋和希 (Kazuki Takahashi) that was serialised in Shonen Jump from 1996 - 2004. The story follows 16-year-old gamer Yuugi Mutou, who solves an ancient Egyptian artifact and awakens a mysterious alter ego who emerges in times of trouble to assist him. The early chapters feature a variety of different games, but the series eventually centres around duels fought in a fictional card game.
The manga has been adapted into two anime series: Yu-Gi-Oh! (1998) (often referred to as "Season 0" by fans); and Yu-Gi-Oh! Duel Monsters (2000 - 2004). The latter was localised for Western audiences as Yu-Gi-Oh!.
This page covers translations of the opening and ending themes used in the anime series.