Unregulated cheats and hacks led a friend and I to inadvertently invent a proto-minecraft over a decade ago.
Around 1998, I was playing Dark Forces 2: Jedi Knight when I started to experience cheats and hacks. Someone taught me how to do it, which was incredibly easy (each weapon file was a text file with variables you could change: projectile=bullet, damage=5, speed=3). Simply replacing the file client side would change the behavior.
When playing around with the projectile=[id] with some ids I found while map making, a friend and I discovered we could modify all of our weapons to shoot out various world objects such as bridges, platforms, doors, etc. We started playing the game almost exclusively this way for quite awhile, going off to separate corners of a map, building things, then comparing our structures.
So, I have to say, great idea on the quarantine, Rockstar!