I don't remember the name... But whatever update it was when total miner first got it's multiplayer option. Where you'd see one world at a time, and had to press refresh a billion times to see a new one, and to join someone it took ten years to load.
Man, I remember my first few maps. I created square buildings with friends but had fun.. Decorated small stupid rooms and secret rooms I'd use as if they were real, oh man so many good times. I still have my original worlds.
The night time seed was fun and crazy before day and night cycles were a thing... The underworld seed, moon, all those.