Yu-Gi-Oh! Online 3: Duel Accelerator was the last update of the Yu-Gi-Oh! Online series, and it added more cards along with many characters from the Yu-Gi-Oh! 5D's anime series.
Players dueled using cards, in the same way as in the Yu-Gi-Oh! Trading Card Game. Each player started with a 40-60 card starter Deck. In this version, you could not obtain cards when dueling.
Cards could also be obtained through trading (only if the player had played 36 or more duels). Cards could also be obtained through beating NPCs at KaibaCorp experimental labs (e.g. beating Yami Yugi 14 times will got you a free "Swift Gaia the Fierce Knight"). You could also buy cards with "Boosterpass Points".
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