Popular games published by company Psion

Backgammon for the ZX81 with 16K memory expansion module or for the ZX Spectrum.

Tournament Tennis is an early tennis game featuring or even creating many conventions that would become standard features in later tennis simulations. Matches can be played at quarter-final, semi-final or final level - winning at one level automatically moves the player to the next one. They can last for 3 or 5 sets, with a player requiring a 2-game lead to win a set, though a tie-break comes in at 6–6 in all but the final set.

A chess program for the Sinclair Spectrum with 48K RAM written in fast and efficient machine-code. The chessboard and chess peices are displayed in high resolution graphics. Ten levels of Spectrum ability: level 2 will probably beat you!