Yu-Gi-Oh! Ultimate Masters: World Championship Tournament 2006, known as Yu-Gi-Oh Duel Monsters Expert 2006 「遊戯王デュエルモンスターズ エキスパート2006」 in Japan, and Yu-Gi-Oh World Championship Tournament 2006 in Europe is a video game released in early Summer 2006 based on the Yu-Gi-Oh! franchise. The gameplay involves the player collecting cards in-game and using them to battle the computer players. Players may also (upon completing the Free Duel mode) battle against Decks which they themselves have designed and saved. This game comes with three promotional Yu-Gi-Oh! cards enclosed; they are "Helios - The Primordial Sun", "Helios Duo Megistus", and "Golden Homunculus". These cards were later handed out in English Blister Packs.