Deceptively simple, yet completely addictive, Tetris has defined puzzle gaming for over a decade. In the game, small shapes called Tetraminoes fall from the top of the play field to the bottom and you must rotate them as they fall and fit them together to complete lines. When you fill an entire line with blocks, it is removed from the screen. If you can't complete lines, the blocks will eventually rise past the top of the screen and you lose. Tetris Worlds features 6 variations of the classic Tetris gameplay, including the all-new Hot-Line Tetris, Fusion Tetris and Cascade Tetris. Take on a friend and see who can clear levels the fastest in 6, unique worlds that evolve and animate as you clear more levels. But be warned...once you start, you won't be able to stop.