Yu-Gi-Oh! Duelist

This is a continuation of the original Yu-Gi-Oh! series and contains the Duelist Kingdom and Battle City arcs. Originally just called Yu-Gi-Oh!, Viz renamed it to its current name.

This series continues in Yu-Gi-Oh! Millennium World

From Viz:
10th grader Yugi spent most of his time alone playing games--until he solved the Millennium Puzzle, a mysterious Egyptian artifact! Possessed by the puzzle, Yugi becomes Yu-Gi-Oh, the King of Games, and challenges evil-doers to the Shadow Games--weird games with high stakes and high risks! These graphic novels contain new stories not seen in the anime, including the origin of Yugi and his friends!