My son and I used to play Starbound. There is a fan-made mod that completely remakes the game and is far better than the original game called Frackin Universe.
The mod is a complete makeover of the game. Even adds new characters and traits for races.
I recall somewhat watching an episode or two of that quite a while ago.
Someone also made a Subnautica mod that looks interesting but unfinished.
I might put this game on my list to return when I do a series on mods.
There is a Sub Nautica mod that allows you to do multiplayer, but it is very wonky. I was very disappointed that Sub Zero wasn't multiplayer either.
I was really surprised how much there was to Sub Nautica, which would have been a lot more fun with a teammate.