The BBC Micro game `Exile' used a mostly-randomly-generated map, with some manually-created areas here and there: https://www.stairwaytohell.com/gamehelp/MAP-Ex

The BBC Micro game `Exile' used a mostly-randomly-generated map, with some manually-created areas here and there: https://www.stairwaytohell.com/gamehelp/MAP-Exile-BC.png https://www.stairwaytohell.com/gamehelp/MAP-Exile-BC.png (very large PNG) The patterns are quite apparent when zoomed out, but on the actual BBC Micro the display area was 128x128 low-res pixels (a 256x128 area on the map image), making it more difficult to spot.