There exists a mmo minesweeper on an infinite board (play.m3o.xyz)
This basically lets you play together on an infinite minesweeper board. I've played it a few years ago and it's cool to see it's still up.
https://play.m3o.xyz/Open linkView original on lemmy.world
It doesn't like it if you play no flag though (you get almost no points). But definitely a fun concept.