Duel Espa Roba
Defeat all tier one duelists three times each and open at least five Red Eyes Black Dragon booster packs.
Duel Computer
Defeat all tier five duelists fifteen times each. Duel Seto Kaiba three times in a row, and on the fourth time the duel computer will be unlocked.
Limitation Option
Complete the game 100% (collect all cards). You can now choose to have restricted cards to be no longer restricted.
Blue Millennium Booster: Defeat Rare Hunter ten times.
Blue/Green Millennium Booster: Defeat Strings ten times.
Dark Ruler Hades Booster: Defeat Bandit Keith ten times.
Gold Millennium Booster: Defeat Odion ten times.
Guardian Sphinx Booster: Defeat Pegasus ten times.
Jinzo Booster: Defeat Weevil ten times.
Purple Millennium Booster: Defeat Umbra and Lumis ten times.
Red Millennium Booster: Defeat Arkana ten times.
Relinquished Booster: Defeat Rex Raptor ten times.
The Masked Beast Booster: Defeat Maku Tsunami ten times.
Thousand-Eyes Restrict Booster: Defeat Bonz ten times.
Toon Summoned Skull Booster: Defeat Espa Roba ten times.
Yamata Dragon Booster: Defeat Joey Wheeler ten times.
Zombrya the Dark Booster: Defeat Mai Valentine ten times.
Permanently Unlock Duelists
Some duelists have extra requirements to unlock. You must constantly meet these requirements or they will vanish from the selection screen. If you defeat a duelist with special requirements ten times, they will be permanently selectable, regardless of their past requirements. For example, if you defeat Joey ten times, you can then duel him even if you have a Jinzo card in your deck. Note: Losses and ties do not count against your total wins.
Duel Faster
Hold L when you are at the duelist selection screen. Continue holding L until the duel starts and it will go much faster.
Duel Yami Yugi
Defeat all tier five duelists fifteen times each. Duel Yugi three times in a row, and on the fourth time Yami Yugi will be unlocked.
Duel Yami Marik
Defeat all tier five duelists fifteen times each. Duel Marik three times in a row, and on the fourth time Yami Marik will be unlocked.
Duel Yami Bakura
Defeat all tier five duelists fifteen times each. Duel Bakura three times in a row, and on the fourth time, Yami Bakura will be unlocked.
Duel Weevil Underwood
Defeat all tier one duelists three times each and open at least five Black Skull Dragon booster packs.
Duel Bonz
Defeat all tier one duelists three times each and open at least five Barrel Dragon booster packs.
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