Diving With Friends

We were skeptical about co-op in Subnautica. Half the appeal of the original was the loneliness, you, the ocean, and whatever was down there. Adding three other players seemed like it would break the spell. It doesn't. If anything, having someone else in the water with you makes the scary parts scarier, because now there's social proof that yes, that shadow is getting closer and yes, you should both be swimming away. The co-op integration is mostly seamless, sharing oxygen in emergencies, splitting up to gather resources, one person piloting the Tadpole while another watches the sonar. It changes the game without betraying what made it work in the first place.

Rewriting Your Biology

DNA modification was apparently planned for the first Subnautica and cut for scope. You can tell it was simmering for a while, because the implementation here is surprisingly well thought out. You scan creatures, extract genetic traits, and splice them into your own DNA at a modification station. The results aren't subtle. Night vision completely changes how you approach dark biomes. Enhanced lung capacity opens up areas that were previously suicide runs. It's not a skill tree, it's more like choosing which animal you want to borrow from. We spent way too long just cataloguing fauna trying to find the perfect combination of traits.