In my early years as a programmer I wrote several games, most of which were available commercially.
Between 1982 and 1984 I wrote four text adventures; two for the Sinclair ZX81 and two for the Sinclair ZX Spectrum. Three of these were published commercially. Click the cassette inlay image (or the game title if you are using a non-graphic browser) to find out more. Each game has explanatory notes, a game file for download (with a link to a suitable emulator), sample screenshots and a complete walkthrough.
In 1982 I also wrote two arcade games; Invasion Force (for the ZX81 and ZX Spectrum) and Gobbleman (for the ZX Spectrum). Both of these games were published by Artic Computing.