No takers - so this one can now be revealed to be Rommel's Revenge, a tanksim player on a Sinclair Spectrum or ZX81 (can't recall, it was my brother's, apart from Pong the only other game I recall on that was a sort of text only version of Dungeons and Dragons with statements like 'There is a dwarf here', typing 'hit dwarf' in response (and most other responses, until you typed the right one) getting the response 'Nothing happens.'

At least Rommel's Revenge was fun. The circle at top was a radar which picked up tank enemies, which fired pixels at you with what looked like a decent ballistic trajectory. Graphics all wire frame of course. Simmers today don't know they are born I always remember this screen - when you got KO'ed, your saw these cracks and you got this message. We didn't worry overmuch about damage models in them thar days.