Volcanoids
If you liked Subnautica, you'll like this. It's still in early access, but is completely playable. I've only run into a bug one time, and it wasn't a gamebreaker by any stretch. It could use a little polish and some QOL improvements, but if you're a fan of plot-based survival games with crafting, this one's your jam.
And it even can do 4 player co-op.
@Dave gifted me this game when he heard it was on my wishlist but I was waiting for a sale. I definitely recommend picking it up.
Basically, there's this island that started having constant, deadly volcanic eruptions every 30 minutes which caused the humans to evacuate (or perish, in the case of those who stayed behind). You are part of a submarine crew that returns to learn the reason for the disaster and investigate the possibility of reclaiming the island. What you find is that a race of steampunk robot "Cog" people have taken over, and are extremely hostile and aggressive to human life. They travel around the island in drill ships that tunnel through the dirt and rock, which allows them to duck out of the way of the pyroclastic flow when the volcano erupts.
So, naturally, you steal a broken down drill ship from them, fix it up, and start taking the fight to them. You can use your drill ship to travel from place to place on the surface, or in myriad subterranean cavern locations. You've got to duck back underground whenever the volcano erupts, or your ship will be destroyed (and you will die). You gather resources and fight Cogs, which gives you materials to research new items and upgrades for your drill ship, making it an ever more useful mobile base.
As you progress and open up new areas of the island (and new areas BELOW the island), you come to learn the connection between the Cogs and the volcanic disaster - and what you can do about it.
Like I said, if Subnautica was your jam, this will be too. And bonus, there's no horrifyingly terrifying great yawning abysses of ocean to make you hysterically scream in panic about. After all, you can't SEE through rock and dirt, and there are no giant predatory leviathan creatures to swallow you whole when you're burrowing like a mole.