Chaos is the sixth and last of the duel world in Yu-Gi-Oh! World Championship 2008.

The player will see two parts of the world, above and beneath.

AboveEdit

Several duel spirits await the player, as usual.

• Evil Hero Malicious Edge (unlocks Evil Hero Infernal Gainer)
• Destiny Hero - Plasma (unlocks Destiny Hero - Disk Commander)
• Elemental Hero Neos Alius (unlocks Neo Space Pathfinder)

BeneathEdit

Several duel spirits await the player, as usual.

• Cyber End Dragon (unlocks Cyberdark Dragon)
• Green Gadget (unlocks Ancient Gear Gadjiltron Dragon)
• Horus the Black Flame Dragon LV8 (unlocks Sacred Phoenix of Nephthys)

Stone MonumentEdit

The stone monument will appear, if the player beat every above duel spirits five times. The stone monument has a craving of Elemental Hero Chaos Neos the player need to summon Elemental Hero Chaos Neos and win the duel, in order to unseal it. Beating this will get the player Jaden Yuki in World Championship Mode.

There is another stone monument, it will appear when the player beat every beneath duel spirits five times. The stone monument has a craving of Armityle the Chaos Phantom, the player need to summon Armityle the Chaos Phantom and to win the duel, in order to unseal it. The player doing this task will unlock Yubel in World Championship Mode.

Clearing the six stone monuments, it will unlock Joey Wheeler and clearing them all unlock Yami Yugi.