Wario World (ワリオワールド, Wario Wārudo) is a 2003 platform beat 'em up video game developed by Treasure and published by Nintendo for the GameCube. It was released in Europe on June 20, 2003, and later in North America, Australia and Japan. The game's plot centers on Wario and his quest to regain his treasure and his castle from Black Jewel, an evil gem.
The game was fairly well received by reviewers, who praised the game's fun gameplay while criticizing its short length. The game has sold over 142,000 copies in Japan and over 256,000 copies in the United States. In 2004, the game was re-released as a Player's Choice title.