Clogger (11th December 1988) (Acorn Electron) A selection of fascinating puzzle games in which you must push together numerous blocks to create a picture in an overhead maze. An exceptionally well-programmed cross between Repton and Sliding Block Puzzles.
Xor (10th January 1987) (Acorn Electron) A mind-bending maze game in which you take control of two shields. Each level presents a different challenge which will test your IQ to breaking point and then some.
Xor For Schools (1st October 1987) (BBC Model B) The original BBC/Electron game of Xor (a maze-based strategy game) plus a designer and a selection of new icons and themes, aimed at schoolchildren with logical minds.