3-D Tetris is a puzzle video game developed and published by Nintendo, released exclusively for the Nintendo Virtual Boy in 1996. The game offers a unique three-dimensional spin to the classic Tetris gameplay. Instead of flat Tetrominoes, the game involves filling layers of a 3D well with geometric shapes. Players must arrange these blocks to clear lines across the three dimensions. Although it shares the Tetris name, the added complexity of the third dimension presents a new challenge. The Virtual Boy's distinctive red-and-black color scheme and stereoscopic 3D visuals aim to enhance this experience, but the system's commercial failure meant that many players never got to experience this uncommon title in the puzzle genre.