Beat Grandpa in a casual duel
Win the Weekend Tournament.
Unleash Exodia, or let Grandpa do it (Special Exodia duel against Grandpa)
Win the Sugoroku Tournament within the first 2 weeks of the game.
Win the KC Tournament.
Win the special Time Wizard duel against Joey without losing life points
Reach the Mystic Stall
Play a special Insect match against Weevil
Win the Limitation Tournament.
Win the Championship.
Solve all 7 of Kaiba's puzzles.
Beat Yami Bakura in a casual duel
Win the Survivorship Tournament.
Beat Kaiba in a casual duel
Beat Kaiba in a casual duel by summoning Exodia
Beat Yugi in a casual duel
Beat Tea in a casual duel
Beat Tristan in a casual duel
Beat Joey in a casual duel
Beat Rex Raptor in a casual duel
Beat Weevil in a casual duel
Beat Mako in a casual duel
Beat Mai in a casual duel
Beat Rare Hunter in a casual duel
Beat Bakura in a casual duel
Beat Strings in a casual duel
Beat Odion in a casual duel
Beat Marik in a casual duel
Beat Yami Yugi in a casual duel
Have over 50,000 Duel Points.
Win 10 duels.
Win 24 duels.
Win 42 duels.
Win over 100 duels.
Defeat Yugi in your very first duel of the game.
Beat Arkana in a casual duel
Have a conversation with the secret spy
Grrr...
Earn a card from a password machine
Beat Umbra and Lumis in a casual duel