I just wanted to chime in and say that if you loved Subnautica you should definitely check out Outer Wilds. It too is all about the unknown, exploration, curiosity and hands-off discovery. It’s a different kind of game but has a similar spirit and can be as awe-inspiring as it can be terrifying.
I mention it here because @Fozzle asked to be hit over the head so he could forget and enjoy Subnautica all over again, and that’s a similar refrain on the Outer Wilds subreddit! Not to mention, folk there pining for a similar experience always recommend Subnautica in return.