Based on the animated manga series, the Yu-Gi-Oh! trading card game pits two players against each other using a customised deck of cards. While you can collect as many as you like, a deck must have between 40 and 60 cards, which may change as rules evolve.
Some physical cards have 8-digit codes that allow players to use them in Yu-Gi-Oh! video games. Moreover, "holo" cards are more valuable collectibles, while regular types provide more value for money in a competitive deck.