The Falsebound Kingdom (遊戯王 フォルスバウンドキングダム ～虚構に閉ざされた王国, Yugiō forusubaundo kingudamu ~ kyokō ni tozasa reta ōkoku) is a role playing video game, it was released for the Nintendo GameCube in Japan in December 2002, November 2003 in North America and everywhere else in late 2004.

The gameplay features a 3D battle stage including bonuses and improvements (such as fortresses, weapons, etc.)

After defeating all enemies on the level, Pegasus arrives and asks Kaiba to lead the resistance, as he 'cannot return to the Empire' with a price on his head.

A climactic plot event in both stories occurs when Mokuba is kidnapped, and Scott forces Kaiba to battle against Yugi.

Either team must defeat Scott Irvine as well as the enemy DarkNite, wielder of one of the God Cards, Obelisk the Tormentor in Yugi's story and Slifer the Sky Dragon in Kaiba's.

Monsters can take items into battle with them with various effects such as increasing their stats or recovery their health.

Monsters can also have unique abilities or attacks with special mechanics, such as hitting multiple targets or doing extra damage to certain enemy types.

The game also includes a Challenge Mode consisting entirely of battles, where the player has to fight various characters from the campaign, such as Joey, Kaiba, and Yugi.