Maybe the most organic exploration game I've ever played. I didn't even find out about the copious amount of radio signals/waypoints until the very end of the game, and I was pretty disappointed when I found out that you needed to do those in order to properly finish the story. It feels like the game was designed around having absolutely zero waypoints (self-made ones notwithstanding) and uses excellent map design and nonverbal storytelling to guide you towards the next objective or points of interest. This is done by several really well planned methods, such as new unlocks like depth upgrades for your vehicles prompting you to use them to reach deeper parts of established caves, keys that are used to unlock areas from different story areas, and enemy types/ attributes and light levels forcing you to approach areas the 'recommended' way. The only thing I came away wanting from Subnautica was more of a reason to spend significant amounts of time building a base, but I'm not really sure that was ever the intention, and I may have just got caught up in it based on my own gaming preferences. Overall a fantastic experience that holds your hand a lot less than I was expecting.