I wrote Reversi in 1981 for the BBC Micro Model A. It was published by Program Power in 1982 but sold only a few hundred copies. It is a simple implementation of the Go-like game Reversi (aka Othello), unusual at the time for working in a higher resolution mode when run on the Model B.
Click Here to download Reversi (5 Kbytes) - [BBC disk image]
Load the disk image into a BBC Emulator and type *RUN REVERSI.