Yu-Gi-Oh! World Championship 2008/Duel World Mode

World 1 - "Grace"
Fairy of the Spring appears from the spring, asking the player to pick a card from the left or right. Sometimes, Kairyu-Shin may appear instead, forcing you to duel him.
 * Spring

"Structure Deck Battles" are held here, where Amazoness Paldain asks you to duel her using a one of the structure decks. There are thirteen in all, the goal being to beat her using all of them.
 * Colosseum

Crystal Seer gives you advice on what to do next if you pay her 50 DP.
 * Fortune House

As the player advances along the main story, more duel worlds will become available.