The Yu-Gi-Oh! anime and manga series introduces an original card game created by Takahashi. Different names can be used to refer to the game depending on where it appears:
Magic & Wizards (M&W) — the original name of the card game, used in the original Yu-Gi-Oh! and Yu-Gi-Oh! R mangas. In the case of the English manga, the game is renamed Duel Monsters in later-released chapters.
Duel Monsters — used in Toei Animation's Yu-Gi-Oh! anime, the second series Yu-Gi-Oh! anime (Japanese and English versions), manga (English version only), and movies. The name is introduced to replace Magic & Wizards, probably due to its similarity to Magic: The Gathering.
Yu-Gi-Oh! Official Card Game: Duel Monsters (Yu-Gi-Oh! OCG) — the original name of the real Yu-Gi-Oh! card game released by Konami, used mostly in Asia.
Yu-Gi-Oh! Trading Card Game (Yu-Gi-Oh! TCG) — used in places where Upper Deck Entertainment distributes Yu-Gi-Oh! OCG.
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