Tetrical - 3D Tetris Stacking Game Developed by Digital Machina Tetrical 3D Tetris Stacking Game Developed by Digital Machina. Tetrical is a three dimensional stacking game. The object of the game is to obtain the highest score by filling layers with falling polycubes. The polycubes are all of the possible combinations of four cubes in three dimensions. Tetrical.com~Site InfoWhoisTrace RouteRBL Check