Gomoku or five in row is favorite game mainly among pupils which are playing it at grid paper.
At the beginning I had crazy idea to create gomoku for command line in windows and linux. I did it in c programming language and it worked fine. Then I started experimenting and compile it with z88dk for zx81 and zx80 and surprisingly it runs well also on these machines with nearly no modification.
So you can try to play game written for windows and linux on zx80 and zx81
Source code repository is here:
https://github.com/berk76/piskworks