Tetris Worlds is a version of the video game Tetris. Originally released in 2001 for Microsoft Windows and Game Boy Advance, it was later released for Xbox, GameCube, and PlayStation 2 in 2002. In 2003, an Xbox Live version and a single-disc compilation version (which included this game and Star Wars: The Clone Wars) were released for the Xbox. The latter was bundled with Xbox systems.

The platform-specific versions of Tetris Worlds were developed by three different companies. Blue Planet Software developed the PC and PlayStation 2 versions, Radical Entertainment developed the GameCube and Xbox versions, and 3d6 Games developed the Game Boy Advance version. All versions were published by THQ under license from The Tetris Company. Tetris Worlds was THQ's first Tetris game, the company later published Tetris Elements for the PC and Mac and Tetris Evolution for the Xbox 360. The PC, PlayStation 2, Xbox and GameCube versions all feature a distinct whispering female voice (Kimerly Unger, credited as eKim) as the announcer. The game has been translated into French, German, Italian and Spanish.