Yu-Gi-Oh! Duel Monsters and Yu-Gi-Oh! The Duelists of the Roses use their own passwords for cards. In later games, players must already have the card in their card list, either by owning at least one copy of it, or by owning most of the other cards in the set the desired card is from. In some games the player will be given the card for free, while in others the player must also pay in-game currency.
In most games, this can only be done once per card. By entering a card's password (usually in a 'Password' screen), the player may obtain that card for their virtual collection. Passwords, while serving no real purpose in the OCG/ TCG, are used in some video games. Because of this consistency, passwords can be useful for identifying cards.
The password for a card is always the same in all languages and all prints of that card, including alternate artwork versions, except for two (' Dark Magician' has an Arkana version, and ' Polymerization' has an alternate artwork version, both with different passwords from their main versions). ' Blue-Eyes White Dragon', with its password, 89631139, visible in the lower-left corner of the card.Ī password is the eight-digit number printed in the bottom-left corner on most OCG/ TCG cards (certain cards, such as ' Gate Guardian', do not have a password, and some cards instead have limitation text in this spot).
