Tetris DX - In-Box - GameBoy ColorPuzzle fans rejoice! The all time puzzle favorite has returned! Tetris DX has everything you need to satisfy your puzzle appetite. Play MARATHON, the classic Tetris game. Try your hand at ULTRA or 40 LINES, two Tetris games with a twist. The VS. game will have you playing for hours! It that's not enough, Tetris DX is fully compatible with the new Game Boy Color system! With the Game Link cable, you can exchange saved information from one system to