Boxes (Alexey Kashkarov) Available for Spectrum 48K/128K/+2/+3
Boxes (Inside Info) Available for Atari 400/800/600XL/800XL/130XE
Boxes (Acorn Programs) Available for BBC/Electron More commonly known as Squares, this is a two-player only version of the game in which you create a maze, and then attempt to fill it in, all with lines between dots.