The Forest should be on sale (just checked, it’s $5 on Steam until Nov 28), and it’s somewhat Subnautica-like. There’s a definite horror element to it, though, so in that way, it’s a different experience, but you still do the “find food, find water, build a base, craft tools” thing.

I don’t think it’s as good as Subnautica, but for $5, it’s still a fun experience, and there is an ongoing story/quest to give you something to focus on. I sank 8 hours into it in the first two days, and there’s still a ton to uncover, so I think it’s worth a play.