DESC: The natural elements of the world are revolting, and the only way to save the planet is to master Metro 3D's portable puzzler. Water, fire, stone and wood pieces fall Tetris-style from the sky, and players must quickly decide how to stack and arrange the cascading pieces. When three like elements are grouped together, the pieces disappear. In a unique twist, players can use special items like bombs and keys to blow up bad guys and unlock secret areas within each area. In all, there are are 50 individual levels to conquer in Quest Mode, as well as a randomly-generated Time Challenge. Puzzle Master is compatible with Game Boy Pocket and the original Game Boy as well as Game Boy Color.